A microwave oven repairer believes that the mean repair cost for damaged computers is more than $95. To test this claim, you determine the repair consts for seven randomly selected computers and find the mean repair cost is $100 per computer with a standard devaition of $42.50. At a = 0.01, do you have enough evidence to support the repairer's claim?

Q: Simplify each expression 7x+6/35x^2+30x * 2x^2+x-36/18x+81

A: We have to simplify the expression…

Q: If a rock falls from a height of 3535 meters on​ Earth, the height H​ (in meters) after x seconds is…

A: The problem is asking us to find the height of the rock after x seconds. The height is given by the…

Q: Find all the values of the following: 1. (-81)^(1/4) 2. 1^(1/5) 3. i^(1/4)

A: Find all the values of the following: 1. (-81)^(1/4) 2. 1^(1/5) 3. i^(1/4)

Q: find A³. Write A³ as input your answer below: all = 912 = 921 = 922 = A = = a11 a21 a12 922

A:

Q: simplify (-32)^3/5 and show work

A: We have to simplify the expression -3235 .

Q: Divide the following. Write the result as an expression that is equivalent to x^3-3x^2+4x+1/x^2+2

A:

Q: Which of the following is equivalent to (-1/2t)^2 Option 1: -1/2t^2 Option 2: -1/4t^2 Option 3:…

A: Given expression: -12t2

Q: find the difference quotient  y=x^2+x

A:

Q: Expand and simplify y=(3x+2)(X^2+4x+9)

A:

Power Operation

Power operation is topic of algebra in Math. It is use to represent repeated multiplication. Very big number and very small number can be easily express using power operation. Power operation is useful in many fields. In space engineering, it helps in representing the distance or size of particular heavenly body. In medical field, it is used to represent very small size. In medical field it helps to mention size of bacteria or virus. 

Exponents

The exponent or power or index of a variable/number is the number of times that variable/number is multiplied by itself.