Question

The force exerted on a spring is proportional to the distance the spring is stretched from its relaxed position. Suppose you stretch a spring a distance of d inches by applying a force of F pounds. For your spring, d/F = 0.8. You apply forces between 40 lb and 54 lb, inclusive. What inequality describes the distances the spring is stretched?
a. 32 ≤ d ≤43.2
b. 40 < d < 54**
c. d < 32 or d > 43.2
d. d < 40 or d > 54

Answer 1

clearly not B. That describes the force applied. You want the distances.

Answer 2

then its d

Answer 3

It cannot be D. You have a range of forces, which will produce a range of distances. Stop guessing.

d/F = 0.8
d = 0.8F

40 <= F <= 54
0.8*40 <= 0.8F <= 0.8*54
32 <= d <= 43.2

Answer 4

thank you @oobleck!

Answer 5

The right answer is A I just took the quiz and got 100%
right answers are:
A
B
B
C
D
A

Just took it!

Answer 6

Thanks, I would have never gotten number 5.

Answer 7

Joskaylor55