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xeze [42]
3 years ago
10

CONSUMER MATH!!

Mathematics
1 answer:
Alexxx [7]3 years ago
6 0

Answer:

$10.52

Step-by-step explanation:

(1137.45 x 14.7%) / 12 - (1137.45 x 3.6%) /12 = 10.52

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Find the size of each of two samples (assume that they are of equal size) needed to estimate the difference between the proporti
hodyreva [135]

Answer:

The sample size n = 4225

Step-by-step explanation:

We will use maximum error formula = \frac{z_{a} S.D}{\sqrt{n} }

but we will find sample size "n"

\sqrt{n}  = \frac{z_{a} S.D}{maximum error}

Squaring on both sides , we get

n  = (\frac{z_{a} S.D}{maximum error})^2

Given 99% confidence interval (z value) = 2.56

given maximum error = 0.02

n  = (\frac{z_{a} p(1-p)}{maximum error})^2

n≤ (\frac{2.56X\frac{1}{2} }{0.02}) ^{2}    ( here S.D = p(1-p) ≤ 1/2

on simplification , we get n = 4225

<u>Conclusion</u>:

The sample size of two samples is  n = 4225

<u>verification</u>:-

We will use maximum error formula = \frac{z_{a} S.D}{\sqrt{n} } = \frac{2.56 1/2}{\ \sqrt{4225} }  = 0.0196

substitute all values and simplify we get maximum error is 0.02

4 0
3 years ago
How do you increase £480 by 7.5%
elena55 [62]
\sf 480+ \frac{7,5*48\not0}{10\not0}= 480+ \frac{36\not0}{1\not0}=480+36=\boxed{\sf 516~\£}
4 0
2 years ago
Find the x- and y-intercepts of the graph of – 7x+ y = 19. State your answers as
mafiozo [28]

Answer:

x-intercept: (-19/7,0)

y-intercept: (0,19)

7 0
3 years ago
How can you use unit rates in multiplication to solve for missing measures and equivalent ratio problems?
geniusboy [140]
By viewing equivalent ratios and rates as deriving from, and extending, pairs of rows (or columns) in the multiplication table and by analyzing simple drawings that indicate the relative size of quantities.
6 0
3 years ago
The top of a table is a parallelogram with a base of 28 cm and a height of 20 cm. Patty wants to cover the table with tiles that
Mandarinka [93]

Answer:

Patty will need 5 more tiles than Jake.

Step-by-step explanation:

8 = 2 × 4, 28 ÷ 2 = 14

9 = 3 × 3, 28 ÷ 3 = 9.3...

14 - 9 = 5

Pls mark Brainliest

5 0
3 years ago
Read 2 more answers
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