Which of the following steps would be most useful in proving that a circle with a radius of 3 inches is similar to a circle with a radius of 2 feet?

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.

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

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square