Answer:
a) 21,952
b) 3,375
c) 36
Step-by-step explanation:
a) 7 X 7 X 7 X 4 X 4 X 4
= 7cube X 4cube
= 343 X 64
= 21,952
b) 5 X 3 X 5 X 3 X 5 X 3( group it)
5 X 5 X 5 X 3 X 3 X 3
= 5cube X 3cube
= 125 X 27
= 3,375
c) 3 X 3 X 2 X 2
= 3square X 2square
= 9 X 4
= 36
Answer:
<u>The correct answer is z = 1.2</u>
Step-by-step explanation:
μ or average income = US$ 3,000
σ or standard deviation = US$ 250
Income in a given month = US$ 3,300
For calculating the z score, we use the following formula:
z = (x – μ) / σ
z = (3,300 – 3,000 / 250)
z = 300/250
z = 6/5 = 1.2
Interpreting z
A Z score tells us how many units of standard deviation (1.2 in this case)from the average a given score is, that is, we do not count in quantity of points, but in quantities of standard deviations. To use the Z score we require the distribution to be normal and to know the average and standard deviation of the scores.
For this item, we represent the very original value or price of the given item by x such that increasing the retail price by 40 percent will give us 1.4x. Also, when the retail price of the item is reduced by 25 percent, we have.
new retail price = 1.4x (1 - 0.25) = 1.05x.
This means that the new retail price is only 5% over the manufacturer price.
Answer:
x=45/75
Step-by-step explanation:
(1+2/3)/x= 2+7/9
5/3x=25/9
5*9= 3x*25
45=75x
x= 45/75 orx=0.6
