Why is homelessness such an issue for San Francisco if it is an innovation hub?

San Francisco has been a technology innovation hot spot since the 1940s when William Shockley helped boost the economy through his invention of the transistor. This new technology was the seed that helped San Francisco's technology industry blossom into what it is today. As we learned from The New Geography of Jobs by Enrico Moretti, San Francisco is home to some of the biggest names in technology like, Google, Apple, Yahoo, Zynga, and Yelp. It is safe to assume that there is a significant amount of individuals with college degrees living and working here, so why is the homeless rate so high?

In 2019 San Francisco reported a population of 17,595 homeless people living in the city. This was a 30% surge since 2017 (Cowan, 2019). This is also likely to be an underestimate as calculating a homeless population is extremely difficult. One would think, if there are so many high skilled, high tech jobs, the multiplier effect would create a massive amount of lower skilled jobs. What might else might be leading to this high level of homelessness?

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La Quinta Inn is staffing its receptionists in its biggest hotel in San Antonio. Receptionists work 6-hour shifts at the hotel lobby. There are two types of receptionists: those who speak English as a first language and those who are fully bilingual (English and Spanish). The requirements for the number of receptionists depend on the customer arrivals during various hours. The Inn believes that the need for receptionists between the hours of 7 A.M. and 10 P.M. are as follows:

Receptionists begin work either at 7 A.M., 10 A.M., 1 P.M., or 4 P.M. At least half of the receptionists needed in any time period should speak English as the first language. Further, at least one-quarter of the receptionists needed in any time period should be fully bilingual.

A) How many and what type of receptionists should be hired for each shift to meet the language and staffing requirements, so that the total number of receptionists is minimized?

B) What is the optimal hiring plan from a cost perspective if English-speaking receptionists are paid $30 per hour and bilingual receptionists are paid $35 per hour?

1) Identical twins Anna and Hannah visit you at the optical clinic. Anna, whose eyes can easily focus on distant objects (her far point), is also able to focus on objects within 20 cm of her eyes (her near point). Assuming the diameter and, hence, the distance between the cornea and retina, of Anna's eye is 20 mm, what is the range (in diopters) of Anna's vision? The limits of this range correspond to the total refractive power of her eyes at their far point and and the refractive power at their near point.

a) from 50 to 50.5 diopters

b) from 50 to 55 diopters

c) from 50 to 60 diopters

d) from 0 to 5 diopters

2) Hannah's eyes have the same range as her sister's, with the same focal power for her cornea (50 diopters) and for her variable lens (5 diopters), but Hannah suffers from myopia. She cannot focus on any object that lies more than 0.7 meters from her eyes since they are slightly longer -- the cornea to retina distance is larger -- than her sister's eyes. Considering this new far point, what is the diameter of Hannah's eyes (in millimeters, to the nearest tenth of a millimeter) assuming Anna's eye diameter was ideally, again, 20.0 mm? Hint: the focal power of the cornea remains the same for Hannah as for Anna for focusing distant objects, but the farthest Hannah can see (object distance) changes from infinity to 0.7 meters.  

3) Assuming, instead, that the diameters of Hannah's myopic eyes were 20.4 mm, but, again, that Hannah's eyes share the same focal powers for her cornea and lens as Anna's, what would be Hannah's near point (to the nearest tenth of a cm, in cm) if Anna's, again, is 20 cm?

4) Now assuming Anna's far point was found to be 0.8 m (i.e., her eyes can't focus on any object more than 0.8 m away), what power corrective lenses would you prescribe to Hannah so that, when wearing these lenses, her visual range was the same as Anna's (from a near point of 20 cm to a far point of infinity? Give your answer in units of diopters, to the nearest tenth of a diopter, with the correct sign.

5) One treatment of cataracts is to surgically remove the variable lens of the eye. If we assume that the cornea's refractive power focuses objects at infinite distances onto the retina of a person who has had this surgery, what power correcting lenses would they need to be able to read text at a 21-cm near-point distance? Again, give your answer in units of diopters, to the nearest tenth of a diopter and with the correct sign.

what is meant by near-transfer versus far-transfer

How important are near absolutes in solving moral issues?

Generally speaking, a DCF valuation consists of two parts: a near-term cash flow projection discounted back, and:

How does the construction of the Van de Graaf demonstrate these two scenarios?

1. The electric field strength near a charged conductor is greatest in the vicinity of the most sharply curved surface therefore air is likely to ionize and initiate a spark near sharp points.

2. it can be shown that if coulomb's law is correct all the static electrical charge on a conductor must reside on its outer surface

based on a fractional and dstillation lab answer the following:

1. why is it important that the coolong water in a distillation apparatus enter the condenser jacket at the lower end and exit at the upper?

2. what effect would a reduction in atmosphericpressure have on the boiling point of ethyl acetate? explain

3. what is themperature gradient in the Vigreux column; is it low near the bootm and high near the top or vice versa?

What realities of nature do source-sink models and landscape models include that basic metapopulation models do not include?

How would lifetime dispersal distance and neighborhood size differ for a plant whose seeds are carried by the wind and a plant whose seeds drop near the parent plant?

Why do most species have their highest densities near the center of their geographic range?

When a direct current flows through a straight length of wire, what is the direction of the magnetic field that is produced near the wire?
A) The magnetic field is antiparallel to the direction of the current.
B)The magnetic field is perpendicular to the direction of the current.    
C)The magnetic field is parallel to the direction of the current.
D)There is no magnetic field near a wire carrying direct current; direct currents do not create magnetic fields.