Answer:
A) $287.60.
B) $323.55.
C) David would pay more for the laptop at the store.
Step-by-step explanation:
A) Given that the store's website is offering the laptop at a 60% discount off the regular price of $ 719, ignoring tax and shipping, the sale price is obtained through the following calculation:
100 - 60 = 40
719 x 0.40 = X
287.6 = X
Therefore, in this case the sale price would be $ 287.6.
B) Since the store is having a sale, offering a 50% discount off the regular price of the laptop, and David also has an in-store-only coupon for an additional 10% off the sale price, ignoring tax, the price of sale is obtained through the following calculation:
(719 x 0.5) x 0.9 = X
359.5 x 0.9 = X
323.55 = X
Thus, the sale price in the present case would be $ 323.55.
Answer:
The sample must be of at least 48 pizzas.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
How large a sample must she take if she wants the margin of error to be under 0.5 inch?
She needs a sample of at least n, in which is found when
Rounding up
The sample must be of at least 48 pizzas.
Answer:
Step-by-step explanation:
3) G
Step-by-step explanation:
Q(-1,-1) R(3,1) S(2,-4)
x+2 y+3 translation then rotation 180 (x,y) be (-x,-y)
Q -1+2 -1+3 (1,2) (-1,-2)
R 3+2 1+3 (5,4) (-5,-4)
S 2+2 -4+3 (4,-1)
The given table is
x y
-9 5
0 3
9 1
The change in x is 9 - (-9) = 9 + 9 = 18
The corresponding change in y is 1 - 5 = -4
The rate of change of y with respect to x is
-4/18 = - 2/9
The slope of the graph verifies that the rate of change is negative.
Answer: -2/9
Answer:
18 minutes
Step-by-step explanation:
Because the question may not provide all the information we need to find the amount of time she spent to read 18 pages of the book. Depend on the average reading speed of a person, it is usually from 60s or 1min per page.
Therefore the time she spend reading 18 pages = 1 * 18 = 18 minutes or 1080 seconds