Solve the problem, using 3.14 for 1. Round to nearest tenth unless instructed differently.
A semicircular driveway has a diameter of 70 ft. How long is the driveway?

109.9

Step-by-step explanation:

It is asking for circumfrence right?

c=pi(d)

c=1/2(3.14)(70)

c=109.9

Sorrry if i am wrong

b

step-by-step explanation:

u take $75 minus $60.the anwer/original($75)multiply by 100

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.