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4 years ago

You bought baseball cards at $8 for 12 cards and added them to your collection

Mathematics

1 answer:

salantis [7]4 years ago

5 0

Step-by-step explanation:

its either you explain it wrong or the answer is jenny doesn't need to spend anymore money to have more baseball cards then you because she already has more then you.

You bought baseball cards at $8 for 12 cards and added them to your collection of 128 baseball cards

128+12=140

Jenny bought baseball cards at $6 for 8 and added them to her collection of 150 baseball cards

150+8=150

150>140

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Find the slope of the line passing through (-2,-3) and (3, 7) m= y2- y1

kondaur [170]

7-(-3)=10
3-(-2)=5

M=10
—
5

M=2

Y=2x+1

6 0

4 years ago

A grapefruit has a peel that is 1cm thick and a total diameter of 12cm. What percentage of volume of the grapefruit is the peel?

ira [324]

Answer:

0.3056 or 30.56%

Step-by-step explanation:

The volume of the grapefruit with the peel is:

$V_p=\frac{4 \pi (d/2)^2}{3}\\V_p=\frac{4 \pi (12/2)^2}{3}\\V_p=48 \pi$

When removing the peel, the grapefruit diameter becomes 10 cm (take out 1 cm of peel from each side). The volume of the grapefruit without the peel is:

$V_n=\frac{4 \pi (d/2)^2}{3}\\V_n=\frac{4 \pi (10/2)^2}{3}\\V_n=33.333 \pi$

The percentage of the volume correspondent to the peel is given by the difference between both volumes, divided by the total volume:

$\%P = \frac{48\pi - 33.333\pi}{48\pi}\\ \%P =0.3056 = 30.56\%$

30.56% of volume of the grapefruit is the peel.

4 0

4 years ago

The vertical angle to the top of a flagpole from point A on the ground is observed to be 37°11'. The observer walks 17 m directl

inysia [295]

Answer:

22m

Step-by-step explanation:

Let height of flagpole=h

AB==17 m

$\angle CAD=37^{\circ}11'=37+\frac{11}{60}=37.183^{\circ}$ (1 degree= 60 minute)

$\angle B=25^{\circ}43'=25+\frac{43}{60}=25.72^{\circ}$

We have to find the approximate height of the flagpole.

In triangle CDA,

$\frac{CD}{DA}=tan\theta=\frac{Perpendicular\;side}{Base}$

$\frac{h}{DA}=tan37.183^{\circ}$

$h=DA(0.759)$

In triangle CDB,

$tan 25.72^{\circ}=\frac{CD}{DB}$

$0.482=\frac{h}{DA+17}$

$0.482DA+8.194=h$

Substitute the value

$0.482DA+8.194=0.759DA$

$8.194=0.759DA-0.482DA$

$8.194=0.277DA$

$DA=\frac{8.194}{0.277}=29.58$

Substitute the value

$h=29.58 \times 0.759=22.45 m\approx 22m$

Hence, the height of the flagpole=22 m

3 0

3 years ago

Write 2,13×10^-3 in decimal form

ipn [44]

Answer:

2,13×10^-3

213×1/10^3; express to positive product

213/10^3; calculate

213/1000; evaluate

=0.213

4 0

3 years ago

Brooke went to the hardware store and bought 20 identical copper pipes. When Brooke lined up the pipes end-to-end, the line was

Sergio039 [100]

Answer: 5cm

Step-by-step explanation:

First and foremost, we should note that

1 meter = 100 centimeters

Therefore, since Brooke went to the hardware store and bought 20 identical copper pipes and their total length is 1 meter long which is 100cm, the length of each pipe will be the title length of the Pipe divided by the number of pipes. This will be:

= 100 / 20

= 5cm each.

Each pipe is 5cm long.

5 0

3 years ago