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3 years ago

10

Sasha is becoming a stronger runner. Last year she ran five miles in 50 minutes. This year hertimi

1 answer:

Fofino [41]3 years ago

7 0

Answer:

40 minutes

Step-by-step explanation:

50 x (1 - 0.2) = 40

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so this boy liked me for years in middle school and i think he finally got over me once i didn't really show much interest in hi

sasho [114]

<em>Ah, female problems, Amiright?</em>

<em>If you don't feel comfortable talking to him, then you don't have to, it's not against the law. And if he tries talking to you and it becomes awkward, make sure that someone is with you that you know will keep a good convo going.</em>

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3 years ago

A new surgery is successful 70% of the time , if the results of 8 such surgeries are randomly sampled, what is the probability t

il63 [147K]

Answer:

P (x>5) = 0.5324014=0.523

Step-by-step explanation:

Here success = p= 0.7 and failure = q= 1-p= 1-0.7 = 0.3

Number of surgeries= n= 8

Applying the binomial distribution

( p+q) ^n= nC x p^x . q^n-x

More than 5 means 6,7, and 8

( p+q) ^8= 8C 5 (0.7)^5 . (0.3)^3

=56* 0.16807*0.027

= 0.254121

( p+q) ^8= 8C 6 (0.7)^6 . (0.3)^2

= 28* 0.1177* 0.09

= 0.296604

( p+q) ^8= 8C 7 (0.7)^7 . (0.3)^1

= 8* 0.0824* 0.3

= 0.19776

( p+q) ^8= 8C8 (0.7)^8 . (0.3)^0

= 1* 0.05765* 1

=0.05765

Adding the above all probabilities gives

P (x>5) = P (x=6) + P(x=7) + P(x=8)

= 0.296604+0.19776+0.05765

= 0.5324014

7 0

3 years ago

Shane marched 3 m East and 6 m north. How far is he from his starting point. Round your answer to the nearest tenth.

Dennis_Churaev [7]

Answer:

The distance from his starting point is <u>6.7 m</u>.

Step-by-step explanation:

Given:

Shane marched 3 m East and 6 m north.

Now, to get the distance from his starting point.

Let the distance from the starting point be $x.$

Now, to solve using pythagorean theorem:

$AB^2+BC^2=AC^2$

$6^2+3^2=x^2$

$36+9=x^2$

$45=x^2$

<em>Using square root on both sides we get:</em>

$6.71=x\\\\x=6.71\ m.$

<u>So, the distance from the starting point nearest to tenth is 6.7 m.</u>

Therefore, he is 6.7 m from his starting point.

6 0

3 years ago

What is the slope of the line on the graph below?

andrezito [222]

Answer:

0

Step-by-step explanation:

because it has no slope

5 0

3 years ago

Read 2 more answers

What is the surface area of the cylinder with height 5 ft and radius 3 ft? Round your answer to the nearest thousandth

BabaBlast [244]

Answer:

150.8ft²

Step-by-step explanation:

A=2πrh+2πr2=2·π·3·5+2·π·32≈150.79645ft²

8 0

3 years ago