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3 years ago

7

Suppose ∠A is complementary to ∠B and ∠B is supplementary to ∠C. If m∠A is 21°, find m∠C. (Type number only) *

1 answer:

vivado [14]3 years ago

8 0

Measure of angle c is 111°

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What is the volume of this rectangular prism in cubic feet?

prisoha [69]

Question asks for answer in units of cubic feet so all dimensions must be converted from yards to feet.

ft x ft x ft = ft^3

Look up conversion: 1 yard = 3 ft

height = 2 yd * 3 = 6 ft
width = 9 ft
length = 3 yd * 3 = 9 ft

volume = 6 ft x 9 ft x 9 ft = 486 ft^3

7 0

3 years ago

What is the area of the figure shown.

dimulka [17.4K]

Answer:

284.52

Step-by-step explanation:

total area = area of semi circle + area of rectangle

area of semicircle = pi r^2 /2.

= 3.14 * (12/2) ^2 ...divided by 2

= 56.52

area of rectangle = length * breadth

= 19*12

= 228

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3 years ago

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Tina’s rectangular living-room floor measures 15 feet by 18 feet. a. How many square feet of carpet will Tina need to cover the

zhenek [66]

90 square yards will be needed

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3 years ago

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Find the answer 10 + (45 x 2)

levacccp [35]

Answer:

100

Step-by-step explanation:

10 + 45*2

10 + 90

100

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3 years ago

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To save money, a local charity organization wants to target its mailing requests for donations to individuals who are most suppo

mars1129 [50]

Answer:

The 80% confidence interval for difference between two means is (0.85, 1.55).

Step-by-step explanation:

The (1 - <em>α</em>) % confidence interval for difference between two means is:

$CI=(\bar x_{1}-\bar x_{2})\pm t_{\alpha/2,(n_{1}+n_{2}-2)}\times SE_{\bar x_{1}-\bar x_{2}}$

Given:

$\bar x_{1}=M_{1}=6.1\\\bar x_{2}=M_{2}=4.9\\SE_{\bar x_{1}-\bar x_{2}}=0.25$

Confidence level = 80%

$t_{\alpha/2, (n_{1}+n_{2}-2)}=t_{0.20/2, (5+5-2)}=t_{0.10,8}=1.397$

*Use a <em>t</em>-table for the critical value.

Compute the 80% confidence interval for difference between two means as follows:

$CI=(6.1-4.9)\pm 1.397\times 0.25\\=1.2\pm 0.34925\\=(0.85075, 1.54925)\\\approx(0.85, 1.55)$

Thus, the 80% confidence interval for difference between two means is (0.85, 1.55).

3 0

3 years ago