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3 years ago

10% out of 100 in simplest form

Mathematics

1 answer:

marin [14]3 years ago

8 0

Answer:

10

Step-by-step explanation:

100 ÷ 10 = 10

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True or False: A race car driver tested his car for time from 0 to 60 mph, and for 20 tests obtained a mean of 4.85 seconds with

sattari [20]

Answer:

The given statement is false.

Step-by-step explanation:

We are given the following in the question:

95% confidence interval: (4.53,5.18)

Sample mean, $\bar{x}$ = 4.85 seconds

Sample size, n = 20

Alpha, α = 0.05

Sample standard deviation, σ = 1.47 seconds

Degree of freedom = n - 1 = 19

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 4 and}~\alpha_{0.01} = \pm 2.09$

$4.85 \pm 2.09(\dfrac{ 1.47}{\sqrt{20}} )\\\\ = 4.85 \pm 0.69 \\\\= (4.16 ,5.54)$

Thus, the calculated confidence interval is different from the given confidence interval.

Hence, the given statement is false.

6 0

4 years ago

Consider the quadratic expression given below.

Jlenok [28]

$3 x^{2} -30x-72=3( x^{2} -10x-24)$

Using cross multiplication method,

x -12 -12x

x 2 2x

$x^{2}$ -24 -10x

Therefore,
$3 x^{2} -30x-72=3( x^{2} -10x-24)$
=3(x-12)(x+2)

5 0

4 years ago

Read 2 more answers

Work our the surface area of this cylinder?

tankabanditka [31]

Answer:

$A=522.97\ \text{cm}^2$

Step-by-step explanation:

Given that,

The diameter of the cylinder, d = 8 cm

Radius, r = 4 cm

Height of the cylinder, h = 16.8 cm

We need to find the surface area of this cylinder. The formula for the surface area of the cylinder is given by :

$A=2\pi r^2+2\pi rh\\\\=2\pi r(r+h)\\\\=2\times \dfrac{22}{7}\times 4\times (4+16.8)\\\\=522.97\ \text{cm}^2$

So, the surface area of the cylinder is $522.97\ \text{cm}^2$

6 0

3 years ago

Tommy goes to Lowe's to buy some supplies for his yard. He buys 4 plants for n dollars, a 10-gallon bucket for $10, and a bag of

Step2247 [10]

Answer:

4n +28

Step-by-step explanation:

Tommy's purchases add up to ...

4n +10 + 18 = 4n +28

7 0

3 years ago

PLS HELP PLSSSSS PLSSSSSS PLSSSSSSSS PLSSSSSSSSSSSSSS HIRRRYYYYYYYYYYYYYYYYYYYYYYYY

qwelly [4]

Answer:

Step-by-step explanation:

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5 0

3 years ago