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3 years ago

I need so much help with this!

Mathematics

1 answer:

leva [86]3 years ago

3 0

Answer:

177

Step-by-step explanation:

8.7×5×2=87

10×3×3=90

87+90=177

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g A report on the nightly news broadcast stated that 10 out of 108 households with pet dogs were burglarized and 20 out of 208 w

Naya [18.7K]

Answer:

Test statistic |Z| = 0.1040 < 1.96 at 0.05 level of significance

Step-by-step explanation:

Step(i):-

Given that a report on the nightly news broadcast stated that 10 out of 108 households with pet dogs were burglarized

First proportion

$p_{1} = \frac{x_{1} }{n_{1} } = \frac{10}{108} = 0.0925$

Given that a report on the nightly news broadcast stated that 20 out of 208 households without pet dogs were burglarized

Second proportion

$p_{2} = \frac{x_{2} }{n_{2} } = \frac{20}{208} = 0.0961$

where

$P = \frac{n_{1}p_{1} +n_{2}p_{2} }{n_{1} +n_{2} }$

P = 0.09486

Q = 1 - P = 1 - 0.09486 = 0.90514

Step(ii):-

Test statistic

$Z = \frac{p_{1}-p_{2} }{\sqrt{PQ(\frac{1}{n_{1} } +\frac{1}{n_{2} } )} }$

$Z = \frac{0.0925-0.0961 }{\sqrt{0.09486 X 0.90514(\frac{1}{108 } +\frac{1}{208 } )} }$

Z = -0.1040

|Z| = |-0.1040|

|Z| = 0.1040

Critical value Z = 1.96 at 0.05 level of significance

6 0

3 years ago

PLZZZ HELP WHAT IS THIS:) <3

7nadin3 [17]

A^2 + b^2 = c^2 in right triangles.
4^2 + b^2 = 8.5^2
16 + b^2 = 72.25
b^2 = 56.25
b = 7.5

4 0

3 years ago

Read 2 more answers

What degree slope is a 16' ramp with a 35" rise

masha68 [24]

Answer:

10.5 Degree.

Step-by-step explanation:

The inclined length of the ramp is 16' i.e. 16 feet i.e. (16 × 12) = 192 inches.

And the rise of the ramp is 35" i.e. 35 inches.

We have to calculate the degree of slope from the above information.

If we consider the ramp as the hypotenuse of a right triangle, then the perpendicular height is 35 inches.

Then angle of slope is given by

$\sin \theta = \frac{Perpendicular}{Hypotenuse} = \frac{35}{192} = 0.182$

⇒ $\theta =\sin^{-1} (0.182)=10.5$ degree. (Answer)

4 0

4 years ago

Natalie practices the piano every day on Monday she practice for 10 minutes if she practice everyday for 10 minutes on which day

Ivahew [28]

Tuesday. The reason is it is when you multiply 9 x10 it will give you 90. So, in order to calculate that you would have to add 9 days on a calendar.

7 0

4 years ago

Read 2 more answers

If y

qwelly [4]

Answer:

Uhhh

Step-by-step explanation:

Ight

5 0

3 years ago