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1 year ago

Please help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Mathematics

1 answer:

SCORPION-xisa [38]1 year ago

7 0

Answer:

Step-by-step explanation:

The y intercept is when x=0

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Find the area of the shaded regions? plss helppp

gregori [183]

Answer:

Larger shaded area = 48pi m^2 and

the small circle has area 4pi m^2.

If you require the as decimal values they are

150.80 m^2 and 12.57 m^2 to the nearest hundredth.

Step-by-step explanation:

The area of the whole circle = pi r^2 = pi 8^2 = 64pi.

The area of the middle sized circle = pi 4*2 = 16pi.

So the area of the larger shaded region

= 64pi - 16pi = 48pi m^2.

The area of the small circle = pi r^2 = 2^2 pi = 4pi m^2.

3 0

3 years ago

Volume of a cube 3.8 ft 1.1 ft

balu736 [363]

Where’s the photo? But I need to answer with a photo 3.8 ft and 1.1 ft equals 4.9 ft

7 0

3 years ago

53010000 thousands in scientific notation

Anit [1.1K]

Answer:

5.301 x 10 to the 7th power is 53010000 thousands in scientific notation.

3 0

3 years ago

In a completely randomized experimental design, three brands of paper towels were tested for their ability to absorb water. Equa

arlik [135]

Answer:

Yes. At this significance level, there is evidence to support the claim that there is a difference in the ability of the brands to absorb water.

Step-by-step explanation:

The question is incomplete:

The significance level is 0.05.

The data is:

Brand X: 91, 100, 88, 89

Brand Y: 99, 96, 94, 99

Brand Z: 83, 88, 89, 76

We have to check if there is a significant difference between the absorbency rating of each brand.

Null hypothesis: all means are equal

$H_0:\mu_x=\mu_y=\mu_z$

Alternative hypothesis: the means are not equal

$H_a: \mu_x\neq\mu_y\neq\mu_z$

We have to apply a one-way ANOVA

We start by calculating the standard deviation for each brand:

$s_x^2=30,\,\,s_y^2=6,\,\,s_z^2=35.33$

Then, we calculate the mean standard error (MSE):

$MSE=(\sum s_i^2)/a=(30+6+35.33)/3=71.33/3=23.78$

Now, we calculate the mean square between (MSB), but we previously have to know the sample means and the mean of the sample means:

$M_x=92,\,\,M_y=97,\,\,M_z=84\\\\M=(92+97+84)/3=91$

The MSB is then:

$s^2=\dfrac{\sum(M_i-M)^2}{N-1}\\\\\\s^2=\dfrac{(92-91)^2+(97-91)^2+(84-91)^2}{3-1}\\\\\\s^2=\dfrac{1+36+49}{2}=\dfrac{86}{2}=43\\\\\\\\MSB=ns^2=4*43=172$

Now we calculate the F statistic as:

$F=MSB/MSE=172/23.78=7.23$

The degrees of freedom of the numerator are:

$dfn=a-1=3-1=2$

The degrees of freedom of the denominator are:

$dfd=N-a=3*4-3=12-3=9$

The P-value of F=7.23, dfn=2 and dfd=9 is:

$P-value=P(F>7.23)=0.01342$

As the P-value (0.013) is smaller than the significance level (0.05), the null hypothesis is rejected.

There is evidence to support the claim that there is a difference in the ability of the brands to absorb water.

3 0

3 years ago

When in europe, you are told that you are eating a steak weighing 140 grams. this is equivalent to how many ounces?

grandymaker [24]

4.94 ounces because there are 0.035 ounces in 1 gram so 0.035 times 140 would give you 4.94 ounces

6 0

3 years ago