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3 years ago

Please help asap i will mark branlist If correct

Mathematics

2 answers:

Alja [10]3 years ago

3 0

Answer:

B is the only one that goes through the axis

Bumek [7]3 years ago

3 0

B because the y axis is going through the middle and not the others

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What is the radius of a semi circle when the area is 20cm

vazorg [7]

hello :
the area of the circle is : 40 cm²
40 = πr²
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r² = 12.73 cm

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2 years ago

Write the fractional equivalent (in reduced form) to each number 30 points

tankabanditka [31]

Correct answers are:

1) 1/3 (NOT 3/10). .3 repeating is not 3/10, 3/10 is .3.
2) 1/8. To solve, .125 has three places, so use 1000. 1000/125 is 8, that is your denominator. 125/125 is 1 is your numerator.
3) 1/6 (divide 100/16, which is 6 ¼ - round to 6. If you carry this out to 1,000,000/166,667, it is very close to 6.
4) 1/10
5) 2/3 (NOT 3/5)
6) 1/5 (2/10 reduced to 1/5)
7) 3/4 (75/100 reduced)

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3 years ago

A school sells raffle tickets to raise money for a charity the money raised from selling raffle tickets, m, is represented by th

irina1246 [14]

P= M÷T , Price equals money raised divided by number of tickets sold

7 0

3 years ago

Line A is perpendicular to Line B.Line B is perpendicular to Line C.Line C is perpendicular Line D.What can be said about Lines

butalik [34]

We can say that lines A and D are perpendicular.

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2 years ago

How heavy a load (pounds) is needed to pull apart pieces of wood 4 inches long and 1.5 inches square? Here are data from student

statuscvo [17]

Answer:

a. (29526.192 , 32155.808)

b. (29673.9301 , 32008.0699)

Step-by-step explanation:

on calculation, we find that sample mean = 30843 and sample standard deviation = 3018.504, and n=20

Sample Mean = 30841

SD = 3000

Sample Size (n) = 20

Standard Error (SE) = SD/root(n) = 670.8204

alpha (a) = 1 - 0.95 = 0.05

z critical value for 95% confidence interval:

z(a/2) = z(0.025) = 1.96

Margin of Error (ME) = z(a/2) x SE = 1314.808

95% confidence interval is given by:

Sample Mean +/- (Margin of Error) = 30841 +/- 1314.808

= (29526.192 , 32155.808)

2)when std dev of population is not known, we use sample's, but we have to use t instead of z

Sample Mean = 30841

SD = 3018.504

Sample Size (n) = 20

Standard Error (SE) = SD/root(n) = 674.958

alpha (a) = 1-0.9 = 0.1

we use t-distribution as population standard deviation is unknown

t(a/2, n-1 ) = 1.7291

Margin of Error (ME) = t(a/2,n-1)x SE = 1167.0699

90% confidence interval is given by:

Sample Mean +/- (Margin of Error)

30841 +/- 1167.0699 = (29673.9301 , 32008.0699)

4 0

3 years ago