Question

5) Which of the following rates are proportional to $3.85 per 1 pound?Select all that apply.A) 5 pounds for $19.25B) $7.70 for 2 poundsC) 4 pounds for $15.10D) $10.00 for 3 poundsE) 10 pounds for $38.50F) $28.75 for 9 pounds

Answer 1

You know that 1 pound costs $3.85.

Knowing this, let's check each option given in the problem.

The procedure is: multiply the amount of pounds shown in each option by $3.85.

Then:

A) 5 pounds for $19.25;

`3.85dollars\cdot5=19.25dollars`

This rate is proportional to $3.85 per 1 pound .

B) $7.70 for 2 pounds:

`3.85dollars\cdot2=7.70dollars`

This rate is proportional to $3.85 per 1 pound .

C) 4 pounds for $15.10:

`3.85dollars\cdot4=15.40dollars`

This rate is not proportional to $3.85 per 1 pound.

D) $10.00 for 3 pounds:

`3.85dollars\cdot3=11.55dollars`

This rate is not proportional to $3.85 per 1 pound.

E) 10 pounds for $38.50:

`3.85dollars\cdot10=38.50dollars`

This rate is proportional to $3.85 per 1 pound.

F) $28.75 for 9 pounds:

`3.85dollars\cdot9=34.65dollars`

This rate is not proportional to $3.85 per 1 pound.

Therefore, the answers are:

A) 5 pounds for $19.25

B) $7.70 for 2 pounds.

E) 10 pounds for $38.50