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3 years ago

Look at the image to see

Mathematics

1 answer:

Rasek [7]3 years ago

8 0

Answer:

surface area = perimeter of base x slant height all of it divided by 2 and then add area of base

pb = 4(6)=24 x 9.5 = 228 /2 = 114 + 36 = 150

hope that answers your question :)

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Darcy and Leah are looking at some fabric selections in a store. All of the selections are marked the same price, and the amount

alex41 [277]

We know that the price of all the fabrics is the same. However, the length of the fabrics is different. We have to determine which fabric is the longest.

Option A: $\frac{43}{5}$ = 8.6

Option B: $\frac{33}{4}$ = 8.25

Option C: $\frac{78}{9}$ = 8.6667

Option D: $\frac{22}{3}$ = 7.33....

Hence, the longest fabric is the one given in option C, and its length is 8.6667

5 0

3 years ago

Read 2 more answers

Consider the following polynomial functions.<br> f(a) = (2a - 7 + a?) and g(a) = (5 – a).

mote1985 [20]

Answer:

1 false

2 true

3 true

4 false

5 true

Step-by-step explanation:

f(a) = (2a - 7 + a^2) and g(a) = (5 – a).

1 false f(a) is a second degree polynomial and g(a) is a first degree polynomial

When added together, they will be a second degree polynomial

2. true When we add and subtract polynomials, we still get a polynomial, so it is closed under addition and subtraction

3. true f(a) + g(a) = (2a - 7 + a^2) + (5 – a)

Combining like terms = a^2 +a -2

4. false f(a) - g(a) = (2a - 7 + a^2) - (5 – a)

Distributing the minus sign (2a - 7 + a^2) - 5 + a

Combining like terms a^2 +3a -12

5. true f(a)* g(a) = (2a - 7 + a^2) (5 – a).

Distribute

(2a - 7 + a^2) (5) – (2a - 7 + a^2) (a)

10a -35a +5a^2 -2a^2 -7a +a^3

Combining like term

-a^3 + 3 a^2 + 17 a - 35

4 0

2 years ago

Read 2 more answers

Selena’s family went on a trip.The total hotel bill was $659.The cost of the airfare was $633.Use mental math to find the total

amid [387]

Answer:1292

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Identify if equations are functions or not functions (see photo) sort them out please

Sav [38]

Answer:

B AND B Because they are the only awnsers that make grammatical sense.

6 0

2 years ago

A student researcher compares the heights of American students and non-American students from the student body of a certain coll

Nonamiya [84]

Answer:

The 90% confidence interval for the difference between means is (4.189, 8.011).

The point estimate is the difference between sample means and has a value of Md=6.1.

Step-by-step explanation:

We have to calculate a 90% confidence interval for the difference between means.

The sample 1 (American students), of size n1=12 has a mean of 69.4 and a standard deviation of 2.79.

The sample 2 (non-American students), of size n2=17 has a mean of 63.3 and a standard deviation of 3.22.

The difference between sample means is Md=6.1.

$M_d=M_1-M_2=69.4-63.3=6.1$

The estimated standard error of the difference between means is computed using the formula:

$s_{M_d}=\sqrt{\dfrac{\sigma_1^2}{n_1}+\dfrac{\sigma_2^2}{n_2}}=\sqrt{\dfrac{2.79^2}{12}+\dfrac{3.22^2}{17}}\\\\\\s_{M_d}=\sqrt{0.649+0.61}=\sqrt{1.259}=1.12$

The critical t-value for a 90% confidence interval is t=1.703.

The margin of error (MOE) can be calculated as:

$MOE=t\cdot s_{M_d}=1.703 \cdot 1.12=1.911$

Then, the lower and upper bounds of the confidence interval are:

$LL=M_d-t \cdot s_{M_d} = 6.1-1.911=4.189\\\\UL=M_d+t \cdot s_{M_d} = 6.1+1.911=8.011$

The 90% confidence interval for the difference between means is (4.189, 8.011).

4 0

3 years ago