greg starts his lawnmower by pulling a cord. The lawnmower successfully starts on the first pull 80% of the time. If the first pull is not successful, Greg tries a second time, which is successful 90% of the time. What is the probability that greg is NOT successful on the first pull, but he starts it on the second pull?

Last saturday, the museum box office sold 281 tickets for a total of $3,954. adults ticket cost $15, and students ticket cost $12. how many of each kind of tickets were sold?

What expression is equivalent to 1/2(2+3x-6)

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.