X=10
-3,-2,-1,0,1,2,3
Add 1,2,3+10
=16
Answer: 3 seconds
Step-by-step explanation: the pump fills 1 tire per second
Altogether is 400 because total means to add and 200 + 200 = 400. That's the answer to your question.
Cos(x) = 10.5 / 20
cos(x) = 0.525
answer
C.
x = 58.3"
