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3 years ago

PLSS give me the answer for the B and C!! ( there two different questions)

Mathematics

1 answer:

Rzqust [24]3 years ago

5 0

Answer:

Circumference Formula :

$2\pi r$

$\frac{120}{360}$

This is the ratio we can work out:

$\frac{given \: angle}{revolution} = ratio$

$arc = ratio \times circumference$

$22 = \frac{120}{360} \times 2 \times \frac{22}{7} \times r$

$22 = \frac{44}{21} x$

$x = 22 \div \frac{41}{21}$

$x = \frac{21}{2}$

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The area of max'ss room ,not incleding his closet is 235.675 square feet the area of his closet is 10.45 square feet what area o

enyata [817]

Given :

Area of room excluding closet is , $a=235.675\ ft^2$ .

Area of closet is , $b=10.45\ ft^2$ .

To Find :

Area of max's room including the closet .

Solution :

Let , area of max's room including the closet is A .

So , Total area = Area of room excluding closet + Area of closet .

$A=a+b\\\\A=(235.675+10.45)\ ft^2\\\\A=246.125\ ft^2$

Therefore , area of his room ,including the closet is 246.125 square feet .

Hence , this is the required solution .

5 0

3 years ago

evaluate the expression when m = 2. 11 – 3m a. 6 b. 10 c. 5 d. 12 and which expressions are equal to 8 when x = 6 and y = 2? cho

Aleks04 [339]

11 - 3m; m = 2 therefore

11 - 3 · 2 = 11 - 6 = 5

Answer: c. 5

----------------------------------------

Answer: b. yx - 4

x = 6 and y = 2

2 · 6 - 4 = 12 - 4 = 8

3 0

3 years ago

4. What is the product of (3x - 1)(x + 4)? HELP PLEASE RIGHT NOT SHOW YOURE WORK!!!!!

LUCKY_DIMON [66]

$3 {x}^{2} + 11x - 4$

$\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\orange{:}}}}}$

$(3x - 1)(x + 4) \\ \\ = 3x(x + 4) - 1(x + 4) \\ \\ = 3 {x}^{2} + 12x - x - 4 \\ \\ = 3 {x}^{2} + 11x - 4$

$\bold{ \green{ \star{ \orange{Mystique35}}}}⋆$

4 0

3 years ago

The height of cylinder a is 32 feet and the height of a cylinder b is 24 feet . If the cylinders are similar , find the surface

katen-ka-za [31]

Answer:

The surface area ratio of cylinder a to cylinder b is $\frac{16}{9}$

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its surface areas is equal to the scale factor squared

The scale factor is equal to the ratio of its corresponding sides

Let

z------> the scale factor

x------> surface area of cylinder a

y------> surface area of cylinder b

$z^{2}=\frac{x}{y}$

step 1

Find the scale factor

$z=\frac{32}{24}=\frac{4}{3}$

step 2

Find the ratio of the surface areas

$z^{2}=\frac{x}{y}$

we have

$z=\frac{4}{3}$

substitute

$(\frac{4}{3})^{2}=\frac{x}{y}$

$\frac{x}{y}=\frac{16}{9}$

5 0

4 years ago

At the Foremost State Bank the average savings account balance in 2012 was $1900. A random sample of 45 savings account balanes

lakkis [162]

Answer:

The calculated |t| = |-26.517|=26.517 > 2.326 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

Step-by-step explanation:

Step(i):-

Mean of the Population = 1900

Given random sample size 'n' = 45

Mean of the sample x⁻ = 1000

Standard deviation of the sample = 225

Null Hypothesis:-

There is no difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012.

Alternative Hypothesis :-

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

Step(ii):-

Test statistic

$t = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }$

$t = \frac{1000-1900 }{\frac{225}{\sqrt{45} } }$

t = -900 /33.54 = -26.517

|t| = |-26.517|=26.517

Degrees of freedom

γ = n-1 = 45-1 =44

t₍₀.₀₁ , ₄₄₎ = 2.326

The calculated |t| = |-26.517|=26.517 > 2.326 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

4 0

3 years ago