Mr. wahnon

’

s vintage sound systems

emporium

has experienced a decrease

in its

sales sin

ce opening

in 2010.

since then, sales

of 8

-

track players

have

been decreasing at a

steady rate of 5.1

% per year. if

the emporium

sold 390

8

-

track players

in 2010

,

write an exponential function

to determine

the

number of

players

sold in 2013

and

give the amount to the nearest whole

unit

.

***2 separate answers

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations