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avanturin [10]
3 years ago
13

Frankie ran 2 miles in 15 minutes. Bella ran 3 miles in 20 minutes. Who ran faster ?

Mathematics
1 answer:
Hoochie [10]3 years ago
3 0

Answer:

Bella

Step-by-step explanation:

So Speed is equal to Distance traveled divided by total time

S = D/T

Since Frankie ran 2 miles in 15 minutes her speed is 2/15 or 0.13333 miles per minute while Bella ran 3 miles in 20 min which is 3/20 or 0.15 miles per minute. So 0.15 > than 0.133 and thus Bella ran faster.

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Question set 2: Many species of terrestrial tree frogs that hibernate at or near the ground surface can survive prolonged exposu
joja [24]

Answer:

0.86

Step-by-step explanation:

The z-score we need to make the comparison is given by

\bf z=\frac{-2.05-(-2)}{\sigma/\sqrt{n}}

where

\bf \sigma= the standard deviation established in the study

n = the sample size

\bf z=\frac{-2.05-(-2)}{0.3/\sqrt{42}}=-1.0801

and for the Normal distribution N(0,1) we want to find  

<em>P(X > -1.0801) </em>

By using a spreadsheet or the table attached, we find that

P(X > -1.0801) = 0.86

(See picture attached)

7 0
3 years ago
This is confusion please help
oksano4ka [1.4K]

Answer:

c = 5√5

Step-by-step explanation:

When we have a right triangle, there is a property about its measurements that is <em>always</em> true, and its called the "Pythagorean Theorem"

First, let's understand the basic terms we use to describe the sides of a triangle:

we can call one leg "a", the other leg "b" and the slanted side "c"

("c" is also called the hypotenuse--and it's always opposite the 90-degree angle)

the pythagorean theorem:

a² + b² = c²

here, our "a" is 5, our "b" is 10 {and we don't know what c is}

let's try plugging these values into our formula:

a² + b² = c²

5² + 10² = c²

25 + 100 = c²      

125 = c²

now, we know what c² is--but we want to know c,

so we must take the square root of both sides

√125 = √c²

√125 = c

now, while √125 <em>is </em>our answer, we can simplify further!

this is because 125 can be made up of 5 · 25

so, \sqrt{125} = \sqrt{5*25}

and

\sqrt{5*25}=\sqrt{5}*\sqrt{25}

we can take out the square root of 25 (5):

=\sqrt{5}*5

we write this as such: 5\sqrt{5}

so, in simplest radical form, c = 5√5

(√125)

hope this helps!! have a lovely day :)

4 0
1 year ago
Helloppppppppp pleaseeeeee !!!!!?!!????????
Georgia [21]

Answer:

20°

Step-by-step explanation:

C70° vertically opposite... the alternate then vertically opposite again then 90° - 70° = 20°

6 0
3 years ago
Please answer!! Will mark Brainliest!!
forsale [732]

Answer:

Is it a multiple choice question

Step-by-step explanation:

8 0
3 years ago
What is 1,234,456×123
Over [174]
 1,234,456×123 = <span>151838088</span>
4 0
3 years ago
Read 2 more answers
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