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Stella [2.4K]
3 years ago
11

Help please this is due at 12 !!!

Mathematics
1 answer:
Blababa [14]3 years ago
8 0

Answer:

Angle BC, because 70+20 = 90

Step-by-step explanation:

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The base of this regular right pyramid is a square. <br><br><br><br> What is its surface area?
natta225 [31]

Answer:

○ C) 256 in.²

Step-by-step explanation:

{a}^{2} + 2a \sqrt{ \frac{ {a}^{2}}{4} + {h}^{2} } = S. A. \\ \\ {8}^{2} + 2(8) \sqrt{ \frac{{8}^{2}}{4} + {12}^{2}} = 64 + 64\sqrt{10}\\ \\ 64\sqrt{10} ≈ 266,3857703 ≈ 256

I am joyous to assist you anytime.

4 0
3 years ago
In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts Co
Gnesinka [82]

Answer:

Proportions have not changed significantly ( B )

Step-by-step explanation:

GIVEN DATA :

Test statistic = 4.99

significance level = 1% = 0.01

k ( number of groups ) = 3

will we use the chi-squared test to determine the degree of freedom

which is : k-1 = 3 - 1 = 2

looking at the chi-square table to determine the critical value of the test

at significance level = 0.01 and degree of freedom = 2 the critical value = 9.21

Comparing the test value ( 4.99 ) and the critical value ( 9.21 ) it can seen  that the test value < critical value  which is a condition for not rejecting null hypothesis of the test.

therefore we won't reject the null hypothesis

7 0
3 years ago
Find the value of x for which m||n
KiRa [710]

Answer:

x = 61

Step-by-step explanation:

Alternate exterior angles must be congruent for the lines to be parallel.

3x - 43 = 2x + 18

x = 61

6 0
2 years ago
A pendulum travels 30 inches on it’s first swing. During each of its subsequent swings, its travels 90 percent of the previous s
Maru [420]
30 and .9 have an amazing day
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4 years ago
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