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sveta [45]
3 years ago
6

A bookmark is shaped like a rectangle with a semicircle attached at both ends. The rectangle is 19 cm long and 4 cm wide. The di

ameter of each circle is the width of the rectangle. What is the area of the bookmark? Use 3.14 for π.
Mathematics
1 answer:
alexira [117]3 years ago
8 0

Answer:

Since we have two semi-circles we can say that we have a full circle. using the circle area formula we can say that

3.14*2^2 = 12.56 cm

Using the rectangle area formula we can say that

19*4 = 76 cm

Adding them both together is

12.56 + 76 = 88.56 cm

So the bookmark has an area of 88.56cm^2

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A fountain is made up of two semicircles and a quarter circle. Find the perimeter of the fountain. Round to the nearest hundredt
Firlakuza [10]

Answer:

Step-by-step explanation:

Ok so the formula for a circle is

A=πr2

The diameter of the semicircle is 15, so if you divide that by 2 you will get a radius of 7.5. Then, the next part of the formula is to square the radius, and to do that you need to multiply the radius by itself. You will then get an answer of 56.25. And then finally, you multiply 56.25 by pi, which is 3.14 and get 176.625. Then for the quarter circle, you have 2 side lengths of 15 feet. To find the area of the quarter circle, do pi times the radius(15), and square the answer. Then, divide the answer by 4 to get the quotient, 554.6025. 176.25 + 554.6025 is 730.8525 . That rounded to the nearest 100th is 730.85.

I really hope this helped and I'm sorry if it is incorrect.

5 0
3 years ago
jason is 6 years older than his sister. Their mother is 15 years older than the sum of their ages. If their mother is 39, how ol
zhuklara [117]

Answer:

Jason would be 18 years old

Step-by-step explanation:

sister = 6

mother = 39

mother is 15 year older than the sum of the kids ages

39-15= 24

24-6= 18

Jason is 18 years old

3 0
3 years ago
Joylin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos
umka2103 [35]

Joylin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. She knows that the total cost to download 3 videos was $12. Her work to find the equation is shown below. Joylin’s Work Step 1 x=3/12=0.25 Step 2 y=0.25x Where did Joylin make her first error? Joylin divided 3 and 12 instead of multiplying the two numbers. Joylin computed the decimal equivalent of 3/12 incorrectly. Joylin used 0.25 as the coefficient of x instead of a product of x and y. Joylin switched the numerator and the denominator when she found k.

Solution:


Joylin switched the numerator and the denominator when she found k.

Joylin should divide 12/3 and not 3/12. As, y is total cost and x is number of videos.

For x=1, number of videos=1, y,or total cost=1*4=4,

For x=2,y=2*4=8

For x=3, y=3*4=12

So, the constant, k=4

So, Answer: Option (D)

Joylin switched the numerator and the denominator when she found k.

4 0
3 years ago
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Elenna [48]
1 (877) 275-7673

Call this number i had the same question a few days ago and they helped me alot
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The answer to number 5
sladkih [1.3K]

Answer:

The answer would be left 2

Step-by-step explanation:

7 0
3 years ago
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