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3 years ago

How can I use models to multiply fractions

2 answers:

8 0

Say we have 1/2 * 1/2. Make a square and cut it in half vertically. Shade one of the halves. Then, cut the square horizontally and shade in half of the shaded area. There we go!

denis-greek [22]3 years ago

7 0

You can count the numbers shaded over the total numbers in the model

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Butch washes half of his kitchen floor in 1/4 hour. His kitchen floor is 120 square feet. What is an equivalent unit rate?

PtichkaEL [24]

D
He washes 60 sq ft in 1/4 of an hour. Multiply 60 by 4 and you get 240 per hour

3 0

3 years ago

An electric sale gives a reading equal to the true weight plus a random error that isnormally distributed with mean 0 and standa

Pepsi [2]

Answer:

a) 95% confidence interval estimate of the true weight is (3.026, 3.274)

b) 99% confidence interval estimate of the true weight is (2.944, 3.356)

Step-by-step explanation:

Confidence Interval can be calculated using M±ME where

M is the mean of five successive weightings (3.150)

ME is the margin of error from the mean

And margin of error (ME) can be calculated using the formula

ME= $\frac{t*s}{\sqrt{N} }$ where

t is the corresponding statistic in the given confidence level and degrees of freedom(t-score)

s is the standard deviation of the random error (0.1)

N is the sample size (5)

Using the numbers 95% confidence interval estimate of the true weight is:

3.150± $\frac{2.776*0.1}{\sqrt{5} }$ ≈3.150±0.124

And 99% confidence interval estimate of the true weight is:

3.150± $\frac{4.604*0.1}{\sqrt{5} }$ ≈3.150±0.206

3 0

3 years ago

Evaluate 6 over 3 plus 7 times 4

ehidna [41]

the answer is B. 244

5 0

4 years ago

Please help right now!!

Oksana_A [137]

i can’t see the question

8 0

3 years ago

Read 2 more answers

Helppppppppppppppp plsssssssssss

mel-nik [20]

Answer:

y=5/1 - 3

Step-by-step explanation:

use rise over run

8 0

2 years ago