A rocket was launched and its height, h, in metres, above the ground after time, t, in seconds, is represented by h = 11 + 10t - 2t^2. What was the initial height
of the rocket?
a) 15 m
b) 7 m
c) 11 m
d) 19 m

Ten times the square of a non-zero number is eqaul to ninety times the number

Iwill give you ! what is the measure of ∠v ?

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function. a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.