All categories

3 years ago

Mary can make a quilt in 3 days and Eva can make

Mathematics

1 answer:

Rina8888 [55]3 years ago

7 0

Answer: in explanation

Step-by-step explanation

Sandi can perform 1/9 of the task in a day

Eva can perform 1/5 of the task in a day

Working together, they can perform

1/9 + 1/5 of the task per day

= 5/45 + 9/45 = 14/45 of the task in a day

or 45/14 days in the task = 3.2 days

It would take about 3.2 days to complete the task working togethe

You might be interested in

One of the more famous anecdotes in the field of statistics is known as the "Lady Tasting Tea" and involves the renowned statist

mote1985 [20]

Answer:

$n=\frac{0.3(1-0.3)}{(\frac{0.01}{1.96})^2}=8067.36$

And rounded up we have that n=8068

Step-by-step explanation:

The margin of error for the proportion interval is given by this:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

We want for this case a 95% of confidence desired, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by:

$z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96$

The margin of error for this case is $ME =\pm 0.01$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

The estimated proportion for this case is $\hat p=0.3$ . And replacing into equation (b) the values from part a we got:

$n=\frac{0.3(1-0.3)}{(\frac{0.01}{1.96})^2}=8067.36$

And rounded up we have that n=8068

7 0

3 years ago

Plzzz Solve these 7 Questions ASAP !!<br> PLZZZZZZZZZZZ IT'S A REQUEST !!!

e-lub [12.9K]

Answer:

B is an answer.

6 0

3 years ago

Your car can do 20 miles per gallon. How many gallons are you going to consume? How much is that in liters? (another clue is giv

dalvyx [7]

40 as king king crab king king authur king king heaven king king earth moon earth sun earth moon moon earth moon and

7 0

2 years ago

Maya drew one highlighter at a time from a container of highlighters. After each draw, the highlighter was replaced,

jonny [76]

Answer:

I think it's red

Sorry dont understand the question

8 0

3 years ago

Two cans of soda and 3 bags of chips are $5.35 and 2 sodas and 4 bag of chips are 6.90 what is the cost for each one?

VLD [36.1K]

....$1.07 each
.....$1.15 each

5 0

3 years ago