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3 years ago

Which one of the following statements is true?

Mathematics

2 answers:

Katarina [22]3 years ago

3 0

Answer:

Step-by-step explanation:

Because the gravity of the earth

mash [69]3 years ago

3 0

Answer:

Step-by-step explanation:

but i think none of the sentences is true

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What is the difference in the areas of a circle with diameter 4 m and a circle with diameter 6 m?

lidiya [134]

Hello!

To solve this you need to use the equation to find the area of a circle which is

$A = \pi r^{2}$

A is area
r is radius

Solve both circles
------------------------------------------------------------------------------------------------------
Circle 1
$A = \pi 4^{2}$

Square the number

$A = 16 \pi$
------------------------------------------------------------------------------------------------------
Circle 2

A = $\pi 6^{2}$

Square the number

$A = 36 \pi$
------------------------------------------------------------------------------------------------------
Finding the answer

To get the answer you subtract the numbers

$36 \pi - 16 \pi = 20 \pi$

The difference is $20 \pi$ which is about 62.83 units

Hope this helps!

5 0

3 years ago

A standardized test has a mean of 110 points and a standard deviation of 10 points. John scored at the 98th percentile on the te

Mariana [72]

Answer: his score 131 points

Step-by-step explanation:

Assuming the scores in the standardized test are normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - µ)/σ

Where

x = standardized test scores.

µ = mean score

σ = standard deviation

From the information given,

µ = 110 points

σ = 10 points

Looking at the normal distribution table, the z score that corresponds to the 98 percentile is 2.06

2.06 = (x - 110)/10

Cross multiplying, it becomes

2.06 × 10 = x - 110

2.06 = x - 110

x = 20.6 + 110

x = 130.6

Approximately, x = 131

4 0

3 years ago

What is the value of this expression when x=-1 and Y=2?<br> 4x^3 y^2

RSB [31]

Answer:

-16

Step-by-step explanation:

4x^3*y^2=

4(-1)^3*(2^2)=

4(-1)^3*(4)=

4*-1*4=

16*-1=

-16

8 0

3 years ago

Determine the standard form of an equation that passes through (2,2) and (-6,4).

Mumz [18]

Slope = (4 - 2)/(-6 - 2)= 2/-8 = -1/4

y = mx + b
2 = -1/4(2) + b
2 = -1/2 + b
b = 5/2

equation
y = -1/4x + 5/2
4y = -x + 10
x + 4y = 10

answer
<span>A) x+4y=10</span>

7 0

3 years ago

Otis had a salad for $4.50, a sandwich for $6.25, and a drink at his favorite restaurant. The tax for the entire meal was $0.54.

UkoKoshka [18]

Assuming 4% tax.

(4.50+6.25+d)0.04= 0.54

(10.75+d)=13.5

d= $2.75

3 0

3 years ago