A researcher wants to compare the effect of a new type of shampoo on hair condition. The researcher believes that men and women may react to the shampoo differently. Additionally, the researcher believes that the shampoo will react differently on hair that is dyed. The subjects are split into four groups: men who dye their hair; men who do not dye their hair; women who dye their hair; women who do not dye their hair. Subjects in each group are randomly assigned to the new shampoo and the old shampoo. This experiment:

A. has two factors (gender and whether hair is dyed) blocked by shampoo type
B. has one factor (shampoo type), blocked by gender and whether hair is dyed
C. has two factors (shampoo type and whether hair is dyed) blocked by gender
D. is completely randomized
E. has three factors (shampoo type, gender, whether hair is dyed).

Option B is correct - this experiment has one factor (shampoo type), blocked by gender and whether the hair is dyed.

Step-by-step explanation:

The researcher desires to compare the effect of a new type of shampoo, he also has the opinion that men and women may react to the shampoo differently.

Furthermore, he believes that the shampoo will react differently to the hair that is dyed.

Therefore, this experiment has one factor(shampoo-type), blocked by gender and whether the hair is dyed.

Hence, option B is the correct option.

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: