All categories

3 years ago

A bookshop has a sale.

Mathematics

1 answer:

LenaWriter [7]3 years ago

4 0

Answer:

The price been reduced by a percentage of 40%

Step-by-step explanation:

we know that

$39.95 -----> represent the 100%

The difference of prices is equal to ($39.95-$23.97)=$15.98

Using proportion

Find the percentage of the difference

100/39.95=x/15.98

x=100*15.98/39.95

x=40%

You might be interested in

Which is the value of i^20+1?

Nonamiya [84]

Answer:

Step-by-step explanation:

$i^{20}+1=i^{2*10}+1\\\\(i^{2})^{10}+1=(-1)^{10}+1\\\\=1+1=2$

8 0

3 years ago

Solve the system of equations using the substitution method.y=2,2x+y=8

OlgaM077 [116]

Answer:

x=3

Step-by-step explanation:

2x+2=8

2x=6

x=3

3 0

3 years ago

Read 2 more answers

Am I correct or wrong on my answer

astraxan [27]

Answer:

wrong

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

An engineer is going to redesign an ejection seat for an airplane. the seat was designed for pilots weighing between 130lb and 1

Vlad [161]

Answer: 0.4758

Step-by-step explanation:

Given : Mean : $\mu=137\text{ lb}$

Standard deviation : $\sigma =28.9\text{ lb}$

Also, the new population of pilots has normally distributed .

The formula to calculate the z-score :-

$z=\dfrac{x-\mu}{\sigma}$

For x=130 lb .

$z=\dfrac{130-137}{28.9}=-0.2422145\approx-0.24$

For x=171lb.

$z=\dfrac{171-137}{28.9}=1.1764705\approx1.18$

The p-value = $P(-0.24$

$=0.8809999-0.4051651=0.4758348\approx0.4758348\approx0.4758$

Hence, the required probability : 0.4758

6 0

3 years ago

I will mark brainliest <br>I need help

d1i1m1o1n [39]

Answer:

4 million a day, 28 million a week, 145,600,000 a year.

Step-by-step explanation:

6 million times 4 is 24 million. Which explains 4 million daily.

4 million times 7 days a week is 28 million weekly.

28 million times 52 weeks a year is 145,600,000.

5 0

3 years ago