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3 years ago

Can someone help me? I'd greatly appreciate it!

Mathematics

1 answer:

Helen [10]3 years ago

5 0

Answer:

11 because you add all the exponents to find the answer 6+4=10 but since R has no number we assume there is an invisible 1 making it 11 :)

Step-by-step explanation:

You might be interested in

Evaluate the expression 42 +6.52 – 33 = 32,

tekilochka [14]

The answer is 223

P.S I did the math by using PEMDAS

4 0

3 years ago

In an article appearing in Today’s Health a writer states that the average number of calories in a serving of popcorn is 75. To

statuscvo [17]

Answer:

$t = 1.9166$

The nutritionist does not have sufficient evidence to reject the writers claim

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 75$

The sample size is $n = 20$

The sample mean is $\= x = 78$

The standard deviation $\sigma = 7$

The level of significance is $\alpha = 0.05$

Now the

Null Hypothesis is $H_o : \mu = 75$

Alternative Hypothesis is $\mu \ne 75$

generally the degree of freedom is mathematically represented as

$df = n-1$

$df = 20 -1$

$df = 19$

For a significance level of 0.05 and 19 degrees of freedom, the critical value for the t-test is 2.093. This is obtain from the t-distribution table

The test statistic is mathematically evaluated as

$t = \frac{ \= x - \mu }{\frac{\sigma }{\sqrt{n} } }$

substituting values

$t = \frac{78 - 75 }{\frac{7 }{\sqrt{20} } }$

$t = 1.9166$

Since the test statistic is below the critical value then the Null hypothesis can not be rejected

So we can conclude that the nutritionist does not have sufficient evidence to reject the writers claim

7 0

3 years ago

Divide 100cm³ in the ratio 1/4,1/2,1/5 to the nearest whole number

Yuki888 [10]

Answer:

1/4,1

Step-by-step explanation:

3 0

3 years ago

Find the area of the parallelogram that has adjacent sides Bold u equals Bold i minus 2 Bold j plus 2 Bold kand Bold v equals 3

Mice21 [21]

Answer:

The area of the parallelogram is $A=\sqrt{26}$ .

Step-by-step explanation:

Let's rewrite these two vectors:

$u=i-2j+2k$

$v=0i+3j-k$

Let's recall that the area of the parallelogram is the magnitude of the cross product between these vectors.

We can use the Determinant method to find it.

$u \times v=\left[\begin{array}{ccc}i&j&k\\1&-2&2\\0&3&-1\end{array}\right] = i((-2)*(-1)-2*3)-j(1*(-1)-2*0)+k(1*3-(-2)*0)=i(2-6)-j(-1)+k(3)=-4i+j+3k$

Now, the magnitude is the square root of each component squared. It will be:

$|u \times v|=\sqrt{(-4)^{2}+(1)^{2}+(3)^{2}}=\sqrt{16+1+9}=\sqrt{26}$

Therefore the $A=\sqrt{26}$ .

I hope it helps you!

8 0

3 years ago

Maya tutors english. for each hour that she tutors, she earns 40 dollars.Her earnings, E (in dollars),after tutoring for h hours

lapo4ka [179]

Answer:

Amount earn by Maya for teaching English in 5 hour = $200

Step-by-step explanation:

Given:

Amount Maya earn in 1 hour for teaching English = $40

Find:

Amount earn by Maya for teaching English in 5 hour

Computation:

Assume;

Per hour earning = E

Number of total hour = h

Total earning = Per hour earning x Number of total hour

Total earning = (E)(h).

So,

Amount earn by Maya for teaching English in 5 hour = 5 x 40

Amount earn by Maya for teaching English in 5 hour = $200

5 0

3 years ago