Becky sent 12 postcards during her 4‑day vacation. How many days would she have to be on vacation to send 15 postcards?

for sending 12 postcards she had to be on vacation for 4 days

for sending 1 postcard she would to be on vacation for 4/12=1/3 days

for sending 15 postcards she would to stay

1/3*15

5 days

the correct answer option is d. la = πrs.

step-by-step explanation:

we know that for a right cone, the lateral surface area is given by:

lateral area of right cone =

here the value under the square root is equal to slant height so replacing this value by in the formula to get:

lateral area of right cone =

therefore, the correct answer option is d.