Find the measure of angle b.

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.

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Find the area of a parallelogram with base 15 yards and height 21 2/3