3 years ago

Solve the equation x^3+2x^2-5x-6=0

Mathematics

1 answer:

Bezzdna [24]3 years ago

5 0

Solution is X=-1 , 2, -3

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Suppose a researcher wants to make sure that the probability of committing a Type I error is less than 5%. How can the researche

d1i1m1o1n [39]

Answer:

B. Set the alpha level at 0.05.

Step-by-step explanation:

Hypothesis testing is a procedure whereby a researcher determines if the null hypothesis is rejected or accepted, depending on the significant level or the alpha level. When a type I error is made, the null hypothesis is rejected even though it is correct. To solve this problem, the significant or alpha level is set to 5% or 0.05.

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3 years ago

The length of a rectangle is twice as long as the width. The area is 400 feet. Find the length and with of the rectangle.

stich3 [128]

Answer:

A=400, L=2W, L*W=A so, L*W=400, so, 400=2W*W or 200=W*W or 200= $W^{2}$ , $\sqrt{200\\$ = W, L=2( $\sqrt{200\\$ ) and W= $\sqrt{200\\$ , W=14.14 and L=28.28