What is the perimeter of the rectangle shown below? A. 13 units
B. 18 units
C. 26 units
D. 40 units

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 ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?