What is the vertex form for y=-3x^2+30x+7

Find the value of the variable and the length of each secant segment

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.

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?