The teacher say the answer is a but i don't know why pls explain me

Estimate the product. round the first factor to the nearest whole number, round the second factor to the nearest ten, and then multiply. 3 8/9 × 96

Which of the following is true about the graph of f(x)=7^x. select all that apply. a= it intercepts the x axis b=it intercepts both axis c=it intercepts neither d=it intercepts the y axis

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5