Question

multiple choice: select the best answer for each question below. do not write on test. answer on your zip grade.

1. marissa bought 8.9 feet of rope. she needs 7/10 of this for her experiment. what length of rope does she need?

a. .623 ft
b. 6.23 ft
c. 62.3 ft
d. 623 ft

1. out of all the weeds in your yard, 60% of them are dandelions. if you have 18 dandelions in your yard, how many total weeds are there?

a. 50
b. 40
c. 30
d. 20

1. as groundwater resources are depleted, what will likely happen to the price of crops that are irrigated with this groundwater?

a. the price will be unaffected by the reduced supply of water.
b. the prices will likely increase because of the reduced supply of water.
c. the prices will likely decrease because of the reduced supply of water.

1. the situation in the previous question may cause farmers to make a decision as to whether they will stay in this farming profession or find a new career. this type of decision is primarily based on

a. a cost-benefit analysis
b. ethics
c. ecology
d. the scientific method

1. most of the united states’ early environmental policies involved restrictions enforced by the government. these are known as

a. incentives.
b. cap-and-trade policies.
c. tax breaks.
d. regulations.

Explanation:

Question 1

Step1: Convert fraction to decimal

$\frac{7}{10} = 0.7$

Step2: Multiply by rope length

$8.9\times0.7 = 6.23$

Step1: Let total weeds be \( x \)

$0.6x = 18$

Step2: Solve for \( x \)

$x=\frac{18}{0.6}=30$

When a resource (groundwater) for crop irrigation is depleted (supply decreases), the cost of producing crops rises. Higher production costs lead to higher crop prices (basic supply - demand: reduced supply of input raises production cost, so crop price increases). Option a is wrong (supply reduction affects price). Option c is wrong (reduced supply should increase, not decrease, price).

Answer:

b. 6.23 ft

Question 2