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2 years ago

10

Gotta question what us 9 times 8 Do not answer the question without showing your work or I'm reporting you because your stealing

my points

2 answers:

Aleksandr-060686 [28]2 years ago

8 0

Answer:

72

Step-by-step explanation:

9x8 is the same as 9+9+9+9+9+9+9+9

when you add them together, you get 72.

Wittaler [7]2 years ago

8 0

Answer:

72

Step-by-step explanation:

9x8=72 because it is similar to 9+9+9+9+9+9+9+9 which is equals to 72 and it is also similar to 8+8+8+8+8+8+8+8+8 which is also equals to 72 because multiplication is repeated addition

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Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.

Vinvika [58]

Answer:

The point estimate for population mean is 8.129 Mpa.

Step-by-step explanation:

We are given the following in the question:

Data on flexural strength(MPa) for concrete beams of a certain type:

11.8, 7.7, 6.5, 6.8, 9.7, 6.8, 7.3, 7.9, 9.7, 8.7, 8.1, 8.5, 6.3, 7.0, 7.3, 7.4, 5.3, 9.0, 8.1, 11.3, 6.3, 7.2, 7.7, 7.8, 11.6, 10.7, 7.0

a) Point estimate of the mean value of strength for the conceptual population of all beams manufactured

We use the sample mean, $\bar{x}$ as the point estimate for population mean.

Formula:

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$\bar{x} = \dfrac{\sum x_i}{n} = \dfrac{219.5}{27} = 8.129$

Thus, the point estimate for population mean is 8.129 Mpa.

4 0

3 years ago

Which is 32.875 written in words?

Verdich [7]

Thirty two point eight seven five

6 0

3 years ago

Read 2 more answers

allsm [11]

Answer:

$\boxed{\text{15.8 cords}}$

Step-by-step explanation:

Step 1. Calculate the volume of the room

V = lwh = 5 yd × 5 yd × 3 yd = 75 yd³

Step 2. Convert cubic yards to cubic feet

3 ft = 1 yd

$V = \text{75 yd}^{3} \times \left(\dfrac{\text{3 ft}}{\text{1 yd}} \right)^{3} = \text{2025 ft}^{3}$

Step 3. Convert cubic feet to cords

128 ft³ = 1 cord

$V = \text{2025 ft}^{3} \times \dfrac{\text{1 cord}}{\text{ 128 ft}^{3}} = \textbf{15.8 cords}\\\\\text{You could fit }\boxed{\textbf{15.8 cords}} \text{ of wood into the room.}$

3 0

3 years ago

The sat scores have an average of 1200 with a standard deviation of 120. a sample of 36 scores is selected. what is the probabil

Naya [18.7K]

We first standardise $\bar{x}$ :
P(1224 > $\bar{x}$ )=P( $\frac{1224-1200}{\frac{120}{ \sqrt{36} }}$ > $\frac{\bar{x}-1200}{\frac{120}{\sqrt{36}}}$ )
which reduces to finding P(Z > 1.2) = 0.115

4 0

3 years ago

Read 2 more answers

I don't know how to do this practice problem :/

Veseljchak [2.6K]

First of all, we know that Emily travels 3/4 of a mile in 4 minutes and 30 seconds (i.e. 9/2 of a minute). So, her current velocity is

$v = \dfrac{\frac{3}{4}}{\frac{9}{2}} =\dfrac{3}{4}\cdot\dfrac{2}{9} = \dfrac{1}{6}$ of a mile per minute.

At this speed, it takes

$t = \dfrac{s}{v} = \dfrac{3.42}{\frac{1}{6}} = 3.42\cdot 6 = 20.52$

minutes to travel 3.42 miles.

Since she left at 8.25, she will arrive at about 8.46, so she's on time for school.

8 0

3 years ago