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3 years ago

Estimate the value of?

Mathematics

2 answers:

otez555 [7]3 years ago

7 0

Answer:

D) 2.0

Step-by-step explanation:

We know that √2 = 1.414213562 ≈ 1.4, π ≈ 3.14, and √5 = 2.236067978 ≈ 2.2 . Next, I found out that √2π = 4.442882938 which rounds to 4.4. Then, I found out that 4.4 ÷ √5 equals to 1.96773982. So, if we round our answer to the nearest whole number, we will get 2.

ozzi3 years ago

6 0

Answer:

$\boxed{Option \ D}$

Step-by-step explanation:

$\frac{\sqrt{2} \pi }{\sqrt{5} }$

Where $\sqrt{2}$ = 1.4 , π = 3.14 and $\sqrt{5}$ = 2.24

Plugging in the values

=> $\frac{(1.4)(3.14)}{2.24}$

=> 4.396/2.24

=> 1.9

≈ 2.0

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Round off 7613.86 to 3s.f

solong [7]

Answer:

$7613.86 = 7610.00$

round off to 3s.f

means change to when you have 3 useful numbers

7613.83 has 4numbers.2decimal

same must be the round off value

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The area of the region under the curve of the function f(x) = 5x + 7 on the interval [1, b] is 88 square units, where b > 1.

djverab [1.8K]

We are given the area of the region under the curve of the function f(x) = 5x + 7 with an interval [1, b] which is 88 square units where b > 1

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3 years ago

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The Cooking Club made some pies to sell during lunch to raise money for a field trip. The cafeteria helped by donating two pies

monitta

Answer: 7 pies

Step-by-step explanation: Since the club split the pies into 5 pieces and then had a total of 45 slices, you would first divide 45 by 5 and you would get 9. The question stated that the cafeteria gave 2 pies and they are asking how much the club made. So you would subtract 9 by 2 to get 7. This concludes to that the club made 7 pies in total. Hope that helps!

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3 years ago

A particular battery claims to have a mean life of 400 hours with a standard deviation of 30 hours. Approximately what percent o

Svetach [21]

Using the normal distribution, it is found that 25.14% of the batteries will last more than 420 hours.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean $\mu$ and standard deviation $\sigma$ is given by:

$Z = \frac{X - \mu}{\sigma}$

The z-score measures how many standard deviations the measure is above or below the mean.

Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

In this problem, we have that the mean and the standard deviation are given, respectively, by:

$\mu = 400, \sigma = 30$ .

The proportion of the batteries will last more than 420 hours is <u>one subtracted by the p-value of Z when X = 420</u>, hence:

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{420 - 400}{30}$

Z = 0.67

Z = 0.67 has a p-value of 0.7486.

1 - 0.7486 = 0.2514.

0.2514 = 25.14% of the batteries will last more than 420 hours.

More can be learned about the normal distribution at brainly.com/question/24663213

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2 years ago

Paige and her family went to the movies. They bought 4 tickets and paid $12 for popcorn. They spent $40. How much did each ticke

Scorpion4ik [409]

Answer:

Cost of tickets: $7. Equation: 40 = 4x + 12.

Step-by-step explanation:

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