Answer:
bold and italic ones
Step-by-step explanation:
1, 60/15=4 so 4 rate of revolutions per second
2, 1800 X 420= 756,00 so 756,000 items would sell in 30 min.
3, you have to show work you i can't help, if i tell the answer you still need your works out
5, 28/4=7, (there is 4 quarts in one gallon) Joe only need 7 containers not 112, he should divide instead of multiply
6, multiply, 0.6 x 30= 18 so 18 miles in 30 mins.
7, 15/5=3 dolphin can travel 3 miles per mins. 30/11= 2.72 Stingray can travel 2.72 miles per mins. 4 x 60= 240 mins, 240/ 92= 2.63 Great white Shark travel 2.63 miles per mins. so dolphin traveled fastest, then Stingray then, great white shark.
