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Diano4ka-milaya [45]
2 years ago
11

Can someone answer this

Mathematics
2 answers:
Gwar [14]2 years ago
8 0
First one is 91 second one is 420
givi [52]2 years ago
5 0

Answer:

what grade is this lol I don't know

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The National Coffee Association reported that of U.S. adults drink coffee daily. A random sample of U.S. adults is selected. Rou
kirill115 [55]

The question is incomplete. The complete question is :

The National Coffee Association reported that 62% of U.S. adults drink coffee daily. A random sample of 225 U.S. adults is selected. Round your answers to at least four decimal places as needed.

Required:

a. Find the mean μ.

b. Find the standard deviation σ.

c. The standard deviation σ.

Solution :

a). Percentage of the US adults who drinks coffee daily = 62%

Therefore, the mean, μ = 0.62

b). We know, p = μ = 0.62

And n = 225

Therefore, the standard deviation is given by :

$\sigma=\sqrt{\frac{p\times (1-p)}{n}}$

 $=\sqrt{\frac{0.62\times (1-0.62)}{225}}$

 $=\sqrt{\frac{0.62\times 0.38}{225}}$

 $=0.0324$

c). Standard deviation, σ = 0.0324

3 0
3 years ago
The opposite process rule says to solve for ________. a known variable by replicating the process used to form the original equa
ioda

Answer:

An unknown variable by reversing the process used to form the original equation.

Step-by-step explanation:

The opposite process rule says to solve for - an unknown variable by reversing the process used to form the original equation.

If an equation indicates an operation such as addition, subtraction, multiplication, or division, solve for the unknown variable by using the opposite process.

For example:

Lets say we have to find x+25=35

Here 25 is subtracted from both sides of the equation to isolate x.

x+25-25=35-25

we get x = 10

Check this : 10+25=35

4 0
3 years ago
The amount of interest accrued on<br> a $7,000 loan with 6% interest after t years.
Misha Larkins [42]

Answer:

$420t

Step-by-step explanation:

Given data

Principal= $7000

Rate= 6%

Time= t years

The expression for the amount is

Simple interest= PRT/100

Sustitute

Simple interest= 7000*6*t/100

Simple interest= 42000t/100

Simple interest= 420t

Hence the amount after t years is $420t

6 0
3 years ago
Tyler tried to solve an equation stop by step
maks197457 [2]

Answer:

Tyler didn't make a mistake

Step-by-step explanation:

3(x+4)=-18

(x+4)=-18/3     (divide by 3 on both the sides)

x+4=-6

x=-6-4   (subtract 4 from both the sides)

x=-10

7 0
3 years ago
(7)8 - 6 divided by 2 + (A)3 = 107. What is A?
Hunter-Best [27]

\huge\fbox{Answer ☘}

7(8) - 6 \div 2 + (a)3 = 107 \\ 56 - 3 + 3a = 107 \\ 53 + 3a = 107 \\ 3a = 107 - 53 \\ 3a = 54 \\ a =  \cancel\frac{54}{3}  = 18

hope helpful~

7 0
3 years ago
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