How many quarts of pure antifreeze must be added to 5 quarts of 20% antifreeze solution to obtain 50% antifreeze solution?

round to nearest tenth as needed.

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

imma say 16%. sorry if its wrong. i'm doing the same stuff right now

step-by-step explanation:

the answer is b