Tyler converted 0.0000783 to scientific notation. 0.0000783 = 78.3 x 10-6

is he correct?

The water has been on the stove y=9.5x+62.1 after how many minutes will the tempature be 138.1 f

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is 37 hours and the median is 33.2 hours. twenty-four of the families in the sample turned on the television for 22 hours or less for the week. the 13th percentile of the data is 22 hours. approximately how many families are in the sample? round your answer to the nearest integer.

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?