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3 years ago

How do you calculate pi? answer quick and u will get brainiest

Mathematics

2 answers:

CaHeK987 [17]3 years ago

8 0

Answer:

Make sure you are using a perfect circle.

Measure the circumference of a circle as accurately as you can.

Measure the diameter of the circle.

Use the formula.

For more accurate results, repeat this process with several different circles, and then average the results.

Step-by-step explanation:

AlexFokin [52]3 years ago

7 0

Answer:

3.14

Step-by-step explanation:

You calculate anything times 3.14

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A seamstress uses 3/4 yards of material to make a uniform top for band members. If there are 6 3/4 yards of material left on the

dalvyx [7]

Answer:

She can make 9 uniform tops from the material left.

Step-by-step explanation:

Given:

Yards of material left on the bolt = $6\frac{3}{4}$

Material requirement for a uniform top for band members = $\frac{3}{4}\ yd$

To find the number of tops that can be made from the material left.

Solution:

In order to find the number of tops that can be made from $6\frac{3}{4}$ yards of material, we need to divide $6\frac{3}{4}\ yd$ by $\frac{3}{4}\ yd$ .

Number of uniform tops that can be made is given as:

⇒ $6\frac{3}{4}\div \frac{3}{4}$

We first convert mixed number to fractions.

⇒ $\frac{27}{4}\div \frac{3}{4}$

To divide fractions the fractions are multiplied after flipping the divisor.

⇒ $\frac{27}{4}\times \frac{4}{3}$

⇒ $\frac{27}{3}$

⇒ 9

Thus, she can make 9 uniform tops from the material left.

4 0

3 years ago

It costs $6.45 to buy 5 songs on I-tunes. How much does it cost to buy 20 songs?

babunello [35]

Answer:$25.80

Step-by-step explanation:

6.45/5 = 1.29

1.29 x 20 =25.80

5 0

2 years ago

How many times does 5 go in to 47

Feliz [49]

47/5=9.40
9*5=45
47/5= 9 2/5

6 0

3 years ago

A box contains 24 transistors,4 of which are defective. If 4 are sold at random,find the following probabilities. i. Exactly 2 a

zavuch27 [327]

SOLUTION

This is a binomial probability. For i, we will apply the Binomial probability formula

i. Exactly 2 are defective

Using the formula, we have

$\begin{gathered} P_x=^nC_x\left(p^x\right?\left(q^{n-x}\right) \\ Where\text{ } \\ P_x=binomial\text{ probability} \\ x=number\text{ of times for a specific outcome with n trials =2} \\ p=\text{ probability of success = }\frac{4}{24}=\frac{1}{6} \\ q=probability\text{ of failure =1-}\frac{1}{6}=\frac{5}{6} \\ ^nC_x=\text{ number of combinations = }^4C_2 \\ n=\text{ number of trials = 4} \end{gathered}$

Note that I made the probability of being defective as the probability of success = p

and probability of none defective as probability of failure = q

Exactly 2 are defective becomes the binomial probability

$\begin{gathered} P_x=^4C_2\times\lparen\frac{1}{6})^2\times\lparen\frac{5}{6})^{4-2} \\ P_x=6\times\frac{1}{36}\times\frac{25}{36} \\ P_x=\frac{25}{216} \\ =0.1157 \end{gathered}$

Hence the answer is 0.1157

(ii) None is defective becomes