Ask question

Ask question

All categories

2 years ago

15

The music store is having a 15% off sale on all classical music cds. Lyell has a coupon for 20% off any classical music cd. How

much will Lyell save on a classical music cd that has a price of $23.99?
a.
$7.20
b.
$7.68
c.
$8.40
d.
$9.60

1 answer:

EleoNora [17]2 years ago

4 0

Answer:

b.

$7.68

Step-by-step explanation:

23.99 * 15%

23.99 * .15 = 3.60 off

23.99-3.60 =20.39 new price

now to use the coupon

20.39 * 20%

20.39*.20= 4.08 off

20.39 - 4.08 =16.31

23.99-16.31 = 7.68

He saved 7.68

You might be interested in

What is the area of the shaded region?

azamat

Answer:

$(25\pi\ -24)\ cm^{2}$

Step-by-step explanation:

we know that

The area of the shaded region is equal to the area of the circle minus the area of the two isosceles triangles

so

Find the area of the circle

The area of the circle is equal to

$A=\pi r^{2}$

where r is the radius of the circle

In this problem we have

$r=5\ cm$

substitute

$A=\pi (5)^{2}$

$A1=25\pi\ cm^{2}$

Find the area of the two triangles

The area of the two isosceles triangles is equal to

$A=2[\frac{1}{2}bh]=bh$

we have

$b=6\ cm$

$h=5-1=4\ cm$

substitute

$A2=6*4=24\ cm^{2}$

Find the area of the shaded region

$A1-A2=(25\pi\ -24)\ cm^{2}$

5 0

2 years ago

Read 2 more answers

A pilot flew a jet from City A to City B, a distance of 1700 miles. On the return trip, the average speed was 20% faster than th

ArbitrLikvidat [17]

The answer is about 650 mi/h

8 0

2 years ago

Read 2 more answers

The temperature reading from a thermocouple placed in a constant-temperature medium is normally distributed with mean μ, the act

stealth61 [152]

Answer: 0.2551

Step-by-step explanation:

Given : The temperature reading from a thermocouple placed in a constant-temperature medium is normally distributed with mean μ, the actual temperature of the medium, and standard deviation σ.

Significance level : $\alpha=1-0.95=0.05$

The critical z-value for 95% confidence : $z_{\alpha/2}=1.960$ (1)

Since , $z=\dfrac{x-\mu}{\sigma}$ (where x be any random variable that represents the temperature reading from a thermocouple.)

Then, from (1)

$\dfrac{x-\mu}{\sigma}=1.96\\\\ x-\mu=1.96\sigma$ (2)

Also, all readings are within 0.5° of μ,

i.e. $x-\mu$

i.e. $1.96\sigma$ [From (2)]

i.e. $\sigma$

i.e. $\sigma\approx0.2551$

The required standard deviation : $\sigma=0.2551$

3 0

2 years ago

Biologists conducted a study to investigate the flying velocity of mosquitoes both before and after feeding. The following scatt

Lesechka [4]

Answer:

It represents a mosquito that flew very fast after feeding relative to all other mosquitoes.

Step-by-step explanation:

The point is unusual because the velocity of the mosquito is substantially greater than all other velocities and is probably an outlier.

4 0

2 years ago

Each inch on a map of Roswell, New Mexico represents $0.51\text{ mile}$. If two hills in Roswell are $7$ inches apart on the map

pav-90 [236]

Answer:

$3.57$

Step-by-step explanation:

we know that

The scale factor on a map is equal to

$\frac{1}{0.51}\frac{inch}{miles}$

so

by proportion

Find how many miles are in the real life $7$ inches apart on the map

$\frac{1}{0.51}\frac{inch}{miles}=\frac{7}{x}\frac{inches}{miles}\\ \\x=0.51*7\\ \\x=3.57 \ miles$

5 0

2 years ago