The lateral area of a cone is 400 pi cm squared. the radius is 10 cm. find the slant height to the nearest tenth.

a. 40 cm

b. 38.7 cm

c. 34 cm

d. 29.1 cm
the answer was a

Option A.

Step-by-step explanation:

we know that

The lateral area of a cone is equal to

we have

substitute and solve for l (slant height)

simplify

Sales tax is the amount of tax per dollar, right? if a dollar is 1.00 then 8% of that dollar would be 0.08. now you have $12 dollars. you would multiple $12x.08, which would be the decimal $0.96. this will be so small because you are multiplying a whole number and a decimal. next, you take that $0.96 and add it to $12, getting $12.96. the total cost of an item that sells for $12 in a town with 8% sales tax would be $12.96.