Using the net below, find the surface area
of the pyramid.
n.
5 in.
15 in.

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Which of the following expressions is equal to 2x^2+8