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spayn [35]
3 years ago
9

Sarah and Kelvin are calculating the area of a circle with a radius of 52 cm. Kelvin uses 3.14 for pi when calculating this area

while Sarah uses the pi button on her calculator. Kelvin gets a solution of 8,490.56 cm2, and Sarah gets a solution of 8,494.87 cm2.
A. Both answers are equally accurate.
B. Kelvin; He did not have to round his answer.
C. Neither answer is accurate as pi or 3.14 is not in the formula for the area of a circle.
D. Sarah; The pi button on the calculator gives a more accurate representation for pi than 3.14.
Mathematics
1 answer:
TiliK225 [7]3 years ago
5 0

Answer:

Correct

The solution is Sarah; The pi button on the calculator gives a more accurate representation for pi than 3.14. Using 3.14 as an approximation for pi yields a less accurate result.

Step-by-step explanation:

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Carl bought 6 hot dogs and 5 drinks and paid $25.10 Susan purchased 6 hot dogs and 3 drinks and was charged $20.10 what is the c
svetlana [45]

Answer:

Let x = the unknown cost of a single hot dog and y = the unknown cost of a single soft drink. We have two unknowns so we need two equations to find them.

Equation 1 - 10 hot dogs and 5 soft drinks cost $35; that is 10x + 5y = 35

Equation 2 - 7 hot dogs and 4 soft drinks cost $25.25; that is 7x + 4y = 25.25

First let's re-write equation 1 to solve for y:

10x + 5y = 35

5y = 35 - 10x (subtract 10x from both sides)

y = 7 - 2x (divide both sides by 5)

Next, let's substitute 7 - 2x for y in equation 2:

7x + 4y = 25.25

7x + 4(7-2x) = 25.25

7x + 28 - 8x = 25.25

-x + 28 = 25.25

x - 28 = -25.25

Solve for x, the cost of a single hot dog. Once you have that, use y = 7 - 2x to find the cost of a single soft drink.

Step-by-step explanation:

Hope it helpful

5 0
3 years ago
17.031 times what would give me 3.5<br> (17.031x = 3.5)
Misha Larkins [42]

Answer:

4.78

Step-by-step explanation:

8 0
3 years ago
What is the slope of the line in the graph?
BabaBlast [244]

For every one unit to the right we go up one unit, i.e. rise/run = 1/1 = 1.  That's a textbook slope of 1.

Answer: 1

4 0
4 years ago
Read 2 more answers
A gardener plants two types of trees in a park:
slega [8]

Answer:

8 years

Step-by-step explanation:

Lets write an equation for Type A

The initial value is 5 ft  and the slope 12 inches

We need to have the same units, so lets change 5 ft to inches

5 ft * 12 inches / ft = 60 inches

y = mx+b

y = 12 x + 60

Lets write an equation for Type B

The initial value is 3 ft  and the slope 15 inches

We need to have the same units, so lets change 3 ft to inches

3 ft * 12 inches / ft = 36 inches

y = mx+b

y = 15 x + 36

We want to know when y is the same value.  We can set the equations equal.

12x + 60 = 15x+36

Subtract 12 x from each side

12x-12x+60 = 15x-12x +36

60 =3x+36

Subtract 36 from each side

60-36 = 3x+36-36

24 = 3x

Divide each side by 3

24/3 = 3x/3

8 =x

It will take 8 years for the trees to be the same height

7 0
3 years ago
Find the value of x. Please help me!
Serga [27]

Answer:

X = 20

Step-by-step explanation:

The angle are supplementary:

  • Meaning that the two angles = 180°

Equation:

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Solve:

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  • Divide 8 from both sides:
  • <u>x = 20</u>
6 0
4 years ago
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