A typical dwarf sperm whale, the planets smallest whale species, weighs about 3*10^2 pounds. A blue whale, the planets largest whale, might weigh about 4.5*10^5 pounds. How many times heavier a blue whale is than a dwarf sperm whale.

I hope this helps

Step-by-step explanation:

just divide the mass of the blue whale by the mass of the sperm whale

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.

it is x=-4

step-by-step explanation: