Please show work and/or explanation! Thank you!

1. In an article in the April 2012 issue of the Newton Conservators newsletter you can read that In the early 1970s there were approximately 40,000 trees lining the streets of Newton. Today, that number is about 26,000a 35% loss. The current annual rate of decline is about 650 trees per year. At this rate, if unchecked, public street

trees would diminish to approximately 10,000 within a generation (25 years), and in 40 years, public street trees would no longer be part of the Newton landscape.

a. Check the arithmetic that leads to the claimed "35% loss".

b. Check the arithmetic that leads to a "current annual rate of 650 trees per year".

c. Check the predictions in the last sentence. Are they likely to come to pass?

d. Write the equation for the linear model implicit in this quotation (use years since 2012 as the independent variable). Identify the slope and the intercept, with their units.

2. The FICA tax is comprised of Social Security and Medicare taxes. The tax rate for the Social Security portion is 6.2 percent on earnings up to a "wage base." The wage base for 2018 is $128,700. The tax rate for the Medicare portion is 1.45 percent on all earnings; there is no wage base limit. Calculate your FICA tax for a wage of

a. $42,500

b. $140,000

3. Below is the 2018 individual Federal Income Tax brackets. Use the information to calculate the amount of federal income tax owed if you made