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3 years ago

8. Sandy has a total of 35 coins in her money jar. If Sandy's jar contains only nickels and dimes and the

Mathematics

1 answer:

AleksandrR [38]3 years ago

7 0

Answer:

C. 20 nickels

Step-by-step explanation:

20 x 5¢ = 100¢ or $1.00

If she has 20 nickels, she has 15 dimes.

15 x 10¢ = 150¢ or $1.50

$1.00 in nickels + $1.50 in dimes = $2.50 total

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A photographer is 6 feet tall and cast a shadow that is 2 feet long. He is photographing a palm tree with a shadow that is 7 fee

Novay_Z [31]

Answer: The height of the tree is 21 feet.

Step-by-step explanation:

Here we can assume that the angle at which the sun impacts the photographer and the tree to be the same angle.

Then we can think in both cases as triangles rectangles, where the height is a cathetus, and the shadow is the other cathetus.

Then we will have a relationship like:

Tg(angle) = shadow/height

height = shadow/Tg(angle)

Now, because for both triangles we have the same angle, then Tg(angle) will be the same number for both cases, and we can just think of it as constant K

Tg(angle) = K

Then we have the equation:

Height = Shadow/K

We know that the photographer is 6ft tall, and his shadow is 2 ft long, we can replace those two things in the above equation and find the value of k:

6ft = 2ft/K

K = 2ft/6ft = (1/3)

Now we know that the shadow of the tree is 7ft long, then the height will be:

height = 7ft/(1/3) = 7ft*3 = 21ft

The tree is 21 ft tall.

6 0

3 years ago

PLZZZZ HELPPPPPP THIS IS TIMEDDDD!!!! *look at picture*

Kazeer [188]

Answer:

Height of the building = 50.8 ft

Step-by-step explanation:

A person and a building are casting the shadows at the same time of the day.

Triangles formed by the person and his shadow and the building and its shadow will be similar.

Therefore, corresponding sides of the similar triangles will be proportional.

$\frac{x}{28}=\frac{5.8}{3.2}$

x = $\frac{5.8\times 28}{3.2}$

x = 50.75

x ≈ 50.8 ft

5 0

2 years ago

Read 2 more answers

An airplane's altitude changed -378 feet over 7 minutes. What was the change of altitude in feet per minute?

Charra [1.4K]

are there any options on what it is

5 0

2 years ago

-x/3 >5 the sign is supposed to be greater than or equal to but I don’t have that option

9966 [12]

Answer:

x ≤ -15

Step-by-step explanation:

-x / 3 ≥ 5

multiply by 3

-x ≥ 15

add x to both sides and subtract 15 from both sides

-15 ≥ x or x ≤ -15

4 0

2 years ago

List the numbers which are factors of both 60 and 96

Elden [556K]

The answer is 2. I hope this helped.

6 0

2 years ago