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3 years ago

EMERGENCY I NEED HELP PLEASEEEEE

Mathematics

2 answers:

makvit [3.9K]3 years ago

6 0

Answer:

64.44 cm²

Step-by-step explanation:

7x11 = 77

$\pi r^{2}$ = 3.14(2)² = 12.56

77 - 12.56 = 64.44 cm²

Irina18 [472]3 years ago

4 0

Answer:

The area of the shaded part of the figure is 64.44 cm².

Step-by-step explanation:

First, we will find the area of the circle. Then, we will find the area of the rectangle. Lastly, we will subtract the area of the circle from the area of the rectangle.

Area of the circle:

A = r² $\pi$

A = 2² $\pi$

A = 4 $\pi$

A = 12.56 cm

Area of the rectangle:

A = lw

A = 11 * 7

A = 77 cm

Now, subtract 12.56 from 77 so we can know the area of the shaded part.

77 - 12.56 = 64.44

So, the area of the shaded part of the shape is 64.44 cm².

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PLEASE HELP:

Gnom [1K]

15 mi/h= 15mi/60 min= 1/4 (mi/min)

x is original speed (mi/min)
t is original time
x*t =260

(x+1/4)=5x/4 is new speed
t-20 - new time
(x+1/4)(t-20)=260

xt = (x+1/4)(t-20)
xt=xt + t/4 - 20x - 5
t/4=20x+5
t=80x +20

We can substitute t=80x +20 into equation x*t =260
x*(80x+20)=260
80x²+20x-260=0
4x²+x-13=0

D=b² - 4ac = 1+4*4*13= 209
x=(-1+/-√209)/2*4
x=1.68 mi/min

1.68mi/min * 60 min/1h≈100 mi/h

Check
260/100=2.6h time with old speed
260/(115)=2.26 h time with new speed
2.6-2.26 = 0.34 h difference between old and new time
0.34h*60min/1h≈20 min difference between old and new time in minutes

6 0

3 years ago

The number in a fraction that tells how many equal parts are in the whole or in a group

stich3 [128]

The denominator. For example 3/17. 17 tells you the whole which is the denominator.

5 0

3 years ago

Please help me! Thank you!

stepladder [879]

Answer:

he got 210 dollars in interest

Step-by-step explanation:

3 0

3 years ago

The sum of two numbers is -12.43 and their difference is 117.77. what are the numbers?

nalin [4]

It is 190.2 because 117.77 minus -12.43 is 190.2

3 0

3 years ago

At the park there a pool shaped like a circle. A - shaped path goes around the pool. Its inner diameter is 18 yd and its outer d

Hoochie [10]

Answer:

46 gallons

Explanation:

First, we need to calculate the area of the path. This area can be calculated as the difference between the area of the outer circle and the area of the inner circle. The area of a circle is equal to

$A=\pi r^2$

Where r is the radius. For the outer circle, the diameter is 28 yd, so the radius is equal to

radius = diameter/2

radius = 28 yd/2

radius = 14 yd

Then, the area of the outer circle is

$\begin{gathered} A=(3.14)(14\text{ yd\rparen}^2 \\ \text{ A = \lparen3.14\rparen\lparen196 yd}^2) \\ A=615.44\text{ yd}^2 \end{gathered}$

In the same way, the radius of the inner circle is

radius = diameter/2

radius = 18 yd/2

radius = 9 yd

Then, the area is

$\begin{gathered} A=(3.14)(9\text{ yd\rparen}^2 \\ A=(3.14)(81\text{ yd}^2) \\ A=254.34\text{ yd}^2 \end{gathered}$

So, the area of the path is

Area path = 615.44 yd² - 254.34 yd²

Area path = 361.1 yd²

Now, we know that one gallon can cover 8 yd², so we can calculate the number of gallons as

$361.1\text{ yd}^2\times\frac{1\text{ gallon}}{8\text{ yd}^2}=45.14\text{ gallons}$

Therefore, the number of gallons is 46 because we need to round the result to a whole number.

8 0

2 years ago