3 years ago

A rectangular garden is 15 ft longer than it is wide. Its area is 6750 ft 2 . What are its dimensions

Mathematics

1 answer:

xxMikexx [17]3 years ago

6 0

Answer:

450 x 15 = 6750 ft 2

Step-by-step explanation:

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A manager at a local company asked his employees how many times they had given blood in the last year. The results of the survey

Lubov Fominskaja [6]

Answer:

$Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779$

And the deviation would be:

$Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54$

Step-by-step explanation:

For this case we have the following distribution given:

X 0 1 2 3 4 5 6

P(X) 0.3 0.25 0.2 0.12 0.07 0.04 0.02

For this case we need to find first the expected value given by:

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

And replacing we got:

$E(X)= 0*0.3 +1*0.25 +2*0.2 +3*0.12 +4*0.07+ 5*0.04 +6*0.02=1.61$

Now we can find the second moment given by:

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

And replacing we got:

$E(X^2)= 0^2*0.3 +1^2*0.25 +2^2*0.2 +3^2*0.12 +4^2*0.07+ 5^2*0.04 +6^2*0.02=4.97$

And the variance would be given by:

$Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779$

And the deviation would be:

$Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54$

8 0

4 years ago

5. Find the value of the 11th term of the arithmetic sequence -2, 5, 12, 19, 26, ...(11th term)

ratelena [41]

Answer:

-2, 5, 12, 19, 26, 33, 40, 47, 54, 61, 68, 75, 82, 89, 96, 103

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2 years ago

Find z. What is the length of the missing leg? b = _____ miles

ycow [4]

Answer:

5√3

Step-by-step explanation:

tan30= 5/z

1/√3= 5/z

z= 5√3

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3 years ago

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What is 85% of 2500 meters

ladessa [460]

2500*0.85=2125 meters

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3 years ago

At the baby next checkup the baby weighed 11 pounds and four ounces how many ounces did the baby gain since the appointment ment

V125BC [204]

Answer:

The baby weighs 8 pounds.

Step-by-step explanation:

Since there are 16 ounces in 1 pound, you divide 128 by 16 to get 8.

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3 years ago