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3 years ago

True or false To find 7% of a number, multiply the number by 0.7

Mathematics

1 answer:

Delicious77 [7]3 years ago

7 0

Answer:

true and it also depends on what question it is

Step-by-step explanation:

because 7% = 0.07 when doing a mathematical question it will help you a lot if you turn 7% into a decimal 0.07 and it will be more easier than doing it as a percentage.

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The Internal Revenue Service (IRS) provides a toll-free help line for taxpayers to call in and get answers to questions as they

Airida [17]

Answer:

a) Null hypothesis: $\mu \geq 14$

Alternative hypothesis: $\mu < 14$

H0: μ -greater than or equal to 14

Ha: μ - less than 14

b) $p_v =P(t_{(49)}$

c) For this case since the p value is higher than the significance level given of 0.05 the answer would be NO

We can't conclude that the actual mean waiting time is significantly less than the claim of 14 minutes made by the taxpayer advocate

Step-by-step explanation:

Data given

$\bar X=12$ represent the sample mean

$\sigma=10$ represent the population standard deviation

$n=50$ sample size

$\mu_o =14$ represent the value that we want to test

$\alpha=0.05$ represent the significance level for the hypothesis test.

z would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

Part a: System of hypothesis

We need to conduct a hypothesis in order to check if the true mean is less than 14 minute, the system of hypothesis would be:

Null hypothesis: $\mu \geq 14$

Alternative hypothesis: $\mu < 14$

The statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

Calculate the statistic

If we replace we got:

$t=\frac{12-14}{\frac{10}{\sqrt{50}}}=-1.414$

Part b: P-value

The first step is calculate the degrees of freedom, on this case:

$df=n-1=50-1=49$

Since is a one sided lower test the p value would be:

$p_v =P(t_{(49)}$

Part c

For this case since the p value is higher than the significance level given of 0.05 the answer would be NO

We can't conclude that the actual mean waiting time is significantly less than the claim of 14 minutes made by the taxpayer advocate

8 0

3 years ago

I'm completely lost. I don't know what to do at all.

timama [110]

If you are given 2 points, it's easy to find the slope.
(8, -6)
(3, -2)

slope = (y₂ - y₁) / (x₂ - x₁)
slope = (-2 + 6) / (3 - 8)
slope = (4) / (-5)
m = 4/-5 or -5/4 or

3 0

4 years ago

Please help dcbvzdsghcvhzsdvghmsvcmhzsvcdhsgvc

Elina [12.6K]

Answer:

Step-by-step explanation:

The graph shows two function:

function f(x) is increasing exponential function of the form $f(x)=a^x$ passing through the point $(1,\frac{9}{2}).$ So, $f(1)=\frac{9}{2}\Rightarrow a^1=a=\frac{9}{2}$ and function f(x) has the expression $f(x)=(\frac{9}{2})^x;$

function g(x) is decreasing exponential function of the form $g(x)=b^x$ passing through the point $(-1,\frac{9}{2}).$ So, $g(-1)=\frac{9}{2}\Rightarrow b^{-1}=\frac{1}{b}=\frac{9}{2},$ so $b=\frac{2}{9}$ and function g(x) has the expression $g(x)=(\frac{2}{9})^x.$

Hence, option A is true.

5 0

3 years ago

(115) the product of integers x, y, and z is even. is z even?

djyliett [7]

1. X/Y = Z

if x = 6, y = 2, then z = 3, not even

if x = 6, y = 3, then z = 2, even

2. Z=XY 

so (z)^2 = 2*k (because x*y*z = 2k, where k is an integer)

Sufficient, as if square of an integer is even ,then the integer is even

5 0

4 years ago

As part of their senior project, Janus and Arya collected a total of $306 for the construction of a storage shed at a homeless s

goblinko [34]

Shown as system of equations:
x + y = 306
y = x - 88
answer through substitution: Arya made 197, Janus made 109

8 0

3 years ago