Answer:
A student must obtain a grade of at least 84.2 in order to get an A.
Step-by-step explanation:
Problems of normally distributed samples can be solved using the z-score formula.
In a set with mean and standard deviation , the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:
If only the best 14 % of the students in the class will receive an A, what grade must a student obtain in order to get an A?
This is the value of X when Z is in the (100-14) = 86th percentile.
So it is the value of X when , and higher values of X. So
A student must obtain a grade of at least 84.2 in order to get an A.
Answer is H. p/5 = 8
Given:
1/5 of the plants in a vegetable garden are cucumber plants.
8 cucumber plants.
Find the total number of plants in the vegetable garden.
8 ÷ 1/5 = p
Steps in dividing fractions.
1) Get reciprocal of 2nd fraction. 1/5 is the 2nd fraction. Its reciprocal is 5/1
2) multiply 1st fraction to the reciprocal of the 2nd fraction
8 * 5/1 = p
3) 8*5 = p ⇒ p = 40
p * 1/5 = 8
p/5 = 8
40/5 = 8
8 = 8
The answer is 1.869 or 1.87
Answer:
A
Step-by-step explanation:
-5/10 this simplifies to -2/5