The volume (in cubic feet) of a black cherry tree can be modeled by the equation y = -50.6+0.4x₁ +4.7x2, where x₁ is the tree's height (in feet) and x2 is the tree's diameter (in inches). Use the multiple regression equation to predict the y-values for the values of the independent variables. (a) x₁ = 73, x₂ = 8.6 (b) x₁ = 65, x₂ = 10.4 (c) x₁ = 83, x₂= 16.9 (d) x₁ = 87, x₂= 20.3

Need A and B done this is all one question. ThankYou!

Find Al. A= AL= 5 2 3 6 |=

Could u please explain the part b?

the answer is not provided, what's going on?

Let C= 3 5 6 - 5 -5. Find 3C. -4-3 3C = []

There is no answer attached

A manufacturer of phone batteries determines that the average length of talk time for one of its batteries is 470 minutes.  Suppose that the standard deviation is known to be 32 minutes and that the data are approximately bell-shaped. Estimate the percentage of batteries whose talk time is between 406 minutes and 534 minutes. Estimate the percentage of batteries whose talk time is less than 438 minutes. Estimate the percentage of batteries whose talk time is more than 534 minutes. answer in excel

Can you answer part c, d and e of the question?

According to the National Association of Colleges and Employers, the 2015 average starting salary for new college graduates in health sciences was $51,541. The average starting salary for new college graduates in business was $53,901 (National Association of Colleges and Employers website). Assume that starting salaries are normally distributed and that the standard deviation for starting salaries for new college graduates in health sciences is $11,000. Assume that the standard deviation for starting salaries for new college graduates in business is $15,000. a. What is the probability that a new college graduate in business will earn a starting salary of at least $65,000 (to 4 decimals)? b. What is the probability that a new college graduate in health sciences will earn a starting salary of at least $65,000 (to 4 decimals)? c. What is the probability that a new college graduate in health sciences will earn a starting salary less than $40,000 (to 4 decimals)? d. How much would a new…