Ishaan is 72 years old and william is 4 years old. how many years will it take until ishaan is only 5 times as old as william?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Luisa sells stuffed animals. she sells her stuffed elephant for $34.90, and the sales tax is 6% of the sale price. about how much is the sales tax on the elephant?

The half-life of a certain material is 0.002 second. approximately how much of a 14-gram sample will be left after 0.004 second? a. 12 grams b. 3.5 grams c. 0.06 gram d. 7 grams