Answer:
8. $35.10
9. $59.63
10. $13.43
11. $70
12. Take the percent you pay (100-the discount) as a decimal and multiply it by the regular price.
Step-by-step explanation:
For finding the price we pay during a sale, we focus on the percent we pay. If 22% off is the sale, then we spend 78% or 100-22-78. We use this percent byb multiplying the price with a decimal. We convert percents into decimals by dividing the percent number by 100. For example, 78% divided by 100 becomes 0.78.
8. Percent off is 22%. We pay 78%=0.78.
45(0.78)=$35.10
9. Percent off is 33%. We pay 67%=0.67.
89(0.67)=$59.63
10. Percent off is 44%. We pay 56%=0.56.
23.99(0.56)=$13.43
11. Percent off is 75%. We pay 25%=0.25.
279.99(0.25)=$70
12. See explanation above.
Answer:
Well, The expression -81 is equal to -81.
Step-by-step explanation:
-81=-81
Answer:
The value of 7 in the number 53.75 is 7/10 and this can be determined by using the arithmetic operations.
Step-by-step explanation:
Given :
Number -- 53.75
The following steps can be used in order to determine the value of 7 in the number 53.75:
Step 1 - Write the given number.
= 53.75
Step 2 - Determine the value of 7 in the above number that is:
= 0.7
Step 3 - Rewrite the value obtained above in the fraction formate.
= 7/10
So, the value of 7 in the number 53.75 is 7/10.
Answer:
6
Step-by-step explanation:
The diagonals of a parallelogram bisect each other.
The diagonals are PN and MO. The point A divides PN into 2 equal segments as well as MO into 2 equal segments.
Since AO = 6, MA should also be equal. Hence, MA (or AM) = 6.
The correct answer is AM = 6
Answer:
Step-by-step explanation:
Let x be the random variable representing the time (in minutes) taken for a dose of a certain drug to be effective as a sedative on lab animals. Since it is normally distributed and the population mean and population standard deviation are known, we would apply the formula,
z = (x - µ)/σ
Where
x = sample mean
µ = population mean
σ = standard deviation
From the information given,
µ = 1
σ = √variance = √0.01 = 0.1
the probability that the time taken for a randomly selected animal is between 1 and 1.1 minutes is expressed as
P(1 ≤ x ≤ 1.1)
For x = 1,
z = (1 - 1)/0.1 = 0
Looking at the normal distribution table, the probability corresponding to the z score is 0.5
For x = 1.1
z = (1.1 - 1)/0.1 = 1
Looking at the normal distribution table, the probability corresponding to the z score is 0.84
Therefore,
P(1 ≤ x ≤ 1.1) = 0.84 - 0.5 = 0.34
The the proportion of animals for which the time taken is between 1 and 1.1 minutes is 0.34
