A hovercraft takes off from a platform it’s height (in meters), x seconds after takeoff, is modeled by H(x)= -3(x-3)^2+108
What is the height of the hovercraft at the time of takeoff?
PLS I NEED THIS ASAP

Which of the following is missing in the explicit formula for the compound interest geometric sequence below?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?

What is 60.9643790503 to 5 decimal