Suppose a recent plant journal indicated that the mean height of mature plants of a certain species of sunflower is 10.4 ft. A
biologist observing a huge field of mature plants of this particular species of sunflower thinks that the mean height is shorter
than reported. He measures the heights of 45 randomly selected sunflowers and finds the mean height to be 10.1 ft.

The hypotheses of interest are :

(A) H0 : µ = 10.1 vs Ha : µ < 10.1

(B) H0 : µ > 10.4 vs Ha : µ = 10.4

(C) H0 : ¯x = 10.1 vs Ha : ¯x > 10.1

(D) H0 : ¯x = 10.1 vs Ha : ¯x < 10.1

(E) H0 : µ = 10.4 vs Ha : µ < 10.4

hi! i think the answer is 1/2 : )

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

too hard the other guy did it

step-by-step explanation:

47

step-by-step explanation: