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3 years ago

What is the ratio

Mathematics

1 answer:

geniusboy [140]3 years ago

5 0

Answer:

I believe the answer would be 9

Step-by-step explanation:

I am sorry if I am wrong let me know.

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While eating ants, a giant anteater flicks its tongue 150 times per minute. At

lisabon 2012 [21]

Answer:

In six minutes, the giant anteater would have flicked its tongue 900 times.

Step-by-step explanation:

Knowing the rate at which the anteater flicks its tongue per minute, you just have to multiply the rate by six.

150×6=900

7 0

3 years ago

Read 2 more answers

A robot can complete tasks 7 in

OLga [1]

Answer:

Step-by-step explanation:

3tasks=7/10 hours

1 task=7/(10×3)

1 task=7/30 hours

Hence a robot takes 7/30 hours to complete one task

7 0

3 years ago

How long does it take to double $1000 at an annual interest rate of 6.35% compounded monthly?

KatRina [158]

Answer:

63.5

Step-by-step explanation:

1000× 6.35 / 100 = 63.5

3 0

3 years ago

What is the solution of this system of linear equations?

Allisa [31]

Answer:

(O,2)

Step-by-step explanation:

So I signed in to iReady did the question and got it right.

7 0

3 years ago

A true-false quiz with 10 questions was given to a statistics class. Following is the probability distribution for the score of

disa [49]

Answer:

$E(X)=\sum_{i=1}^n X_i P(X_i)$

And if we use the values obtained we got:

$E(X)=5*0.05 +6*0.15 +7*0.33 +8*0.28+ 9*0.12 +10*0.07=7.48$

For this case this value means that the expected score is about 7.48

Step-by-step explanation:

For this case we assume the following probability distribution:

X 5 6 7 8 9 10

P(X) 0.05 0.15 0.33 0.28 0.12 0.07

First we need to find the expected value (first moment) and the second moment in order to find the variance and then the standard deviation.

In order to calculate the expected value we can use the following formula:

$E(X)=\sum_{i=1}^n X_i P(X_i)$

And if we use the values obtained we got:

$E(X)=5*0.05 +6*0.15 +7*0.33 +8*0.28+ 9*0.12 +10*0.07=7.48$

For this case this value means that the expected score is about 7.48

In order to find the standard deviation we need to find first the second moment, given by :

$E(X^2)=\sum_{i=1}^n X^2_i P(X_i)$

And using the formula we got:

$E(X^2)=(5^2 *0.05)+(6^2 *0.15)+(7^2 *0.33)+(8^2 *0.28)+ (9^2 *0.12 +(10^2 *0.07))=57.46$

Then we can find the variance with the following formula:

$Var(X)=E(X^2)-[E(X)]^2 =57.46-(7.48)^2 =1.5096$

And then the standard deviation would be given by:

$Sd(X)=\sqrt{Var(X)}=\sqrt{1.5096}=1.229$

5 0

4 years ago

Read 2 more answers