All categories

3 years ago

WORTH 8 POINTSWhat is the area of a rectangle with side lengths of 6/8 meter and 4/ 10 meter?

Mathematics

1 answer:

miv72 [106K]3 years ago

5 0

Answer:

3/10 (see picture for work)

<h2>Correction:</h2>

I meant to write down $a=l*h$ , not $a=b*w$ .

You might be interested in

100 POINTS 100 POINTS!

Elis [28]

Answer:

Step-by-step explanation:

As each step has the same depth and rise, they are respectively 1.2/4=0.3m and 1.8/4=0.45m.

Dividing the steps along the dotted lines, the total rise of the 4 concrete steps = (1+2+3+4)*0.45

= 4.5m

Total concrete volume = total rise * depth * width

= 4.5*0.3*1.8

= 2.43m^3

7 0

3 years ago

Read 2 more answers

(8x2 - 2x) - (x2 - x + 5)

Sonja [21]

Answer:

7x^2 -x -5

Step-by-step explanation:

(8x^2 - 2x) - (x^2 - x + 5)

Distribute the minus sign

(8x^2 - 2x) - x^2 + x - 5

Combine like terms

7x^2 -x -5

7 0

4 years ago

Read 2 more answers

Which family of function does the graph on the right belongs to?

N76 [4]

Answer:

wheres the graph

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

What’s the answer for 5/9+w=7/9

Allushta [10]

Answer:

w = 2/9.

Good luck! This Is Correct, BTW

6 0

3 years ago

Read 2 more answers

A recent national survey found that high school students watched an average (mean) of 7.2 movies per month with a population sta

VladimirAG [237]

Answer:

1. Option A

2. Option D) Reject null hypothesis if z < –1.645

3. z = -4.90

4. P-value = 0.00001

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 7.2

Sample mean, $\bar{x}$ = 6.5

Sample size, n = 49

Alpha, α = 0.05

Population standard deviation, σ = 1.0

a) First, we design the null and the alternate hypothesis

$H_{0}: \mu \geq 7.2\text{ movies per month}\\H_A: \mu < 7.2\text{ movies per month}$

Option A) is the correct answer

We use one-tailed(left) z test to perform this hypothesis.

c) Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{6.5 - 7.2}{\frac{1}{\sqrt{49}} } = -4.90$

b) Now, $z_{critical} \text{ at 0.05 level of significance } = -1.645$

Rejection rule:

If calculated z-statistic is less than the critical z-value, we reject the null hypothesis.

Option D) Reject null hypothesis if z < –1.645

d) Now, we calculate the p-value with the help of standard normal table.

P-value = 0.00001

Since the p-value is lower than the significance level, we fail to accept the null hypothesis and reject it.We accept the alternate hypothesis.

We conclude that the college students watch fewer movies a month than high school students.

6 0

3 years ago