Are parents of girls more inclined to buy them a car when they leave for college than parents of boys? Simple random samples of 40 girls and 45 boys are taken from a large university on the West Coast. When interviewed, 20 girls and 21 boys in the sample responded that their parents bought them a car. What is a 95% confidence interval for the difference in population proportions of girls and boys whose parents bought a car for them when they left for college? Use girls as Group 1 and boys as Group 2

yes because they have the same amount of green and blur marbles.

step-by-step explanation:

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places

c

step-by-step explanation: