The half-life of a certain element is 46 days. How long will it take for a 128 mg sample to decay so that only 20 mg are left? Round your answer to the nearest
tenth and do NOT label.

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

Afamily has two cars. the first car has a fuel efficiency of 25 miles per gallon of gas and the second has a fuel efficiency of 15 miles per gallon of gas. during one particular week, the two cars went a combined total of 1025 miles, for a total gas consumption of 55 gallons. how many gallons were consumed by each of the two cars that week?