Atree casts a shadow of 28 feet. at the same time, a biologist who is 7 feet tall casts a shadow of 2 feet.

Ratio of shadow to object's size = 2/7

Then, size of tree would be: 7/2 * 28 = 7 * 14 = 98 feet

So, your final answer is 98 feet

Hope this helps!

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.