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2 years ago

Please explain how this is incorrect.

Mathematics

1 answer:

MatroZZZ [7]2 years ago

5 0

Step-by-step explanation:

The spores always x3 after a month so going a month back they ÷3 instead so 900÷3 is 300 spores on the first month

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Which expression is equivalent to 5(9 + 7)? 14 + 12 14 + 7 45 + 7 45 + 35

nika2105 [10]

5(9 + 7) = 5 x 9 + 5 x 7 = 45 + 35

3 0

3 years ago

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Oliga [24]

Answer:

Part A)

The height of the water level in the rectangular vessel is 2 centimeters.

Part B)

4000 cubic centimeters or 4 liters of water.

Step-by-step explanation:

We are given a cubical vessel that has side lengths of 10cm. The vessel is completely filled with water.

Therefore, the total volume of water in the cubical vessel is:

$V_{C}=(10)^3=1000\text{ cm}^3$

This volume is poured into a rectangular vessel that has a length of 25cm, breadth of 20cm, and a height of 10cm.

Therefore, if the water level is h centimeters, then the volume of the rectangular vessel is:

$V_R=h(25)(20)=500h\text{ cm}^3$

Since the cubical vessel has 1000 cubic centimeters of water, this means that when we pour the water from the cubical vessel into the rectangular vessel, the volume of the rectangular vessel will also be 1000 cubic centimeters. Hence:

$500h=1000$

Therefore:

$h=2$

So, the height of the water level in the rectangular vessel is 2 centimeters.

To find how how much more water is needed to completely fill the rectangular vessel, we can find the maximum volume of the rectangular vessel and then subtract the volume already in there (1000 cubic centimeters) from the maximum volume.

The maximum value of the rectangular vessel is given by :

$A_{R_M}=20(25)(10)=5000 \text{ cm}^3$

Since we already have 1000 cubic centimeters of water in the vessel, this means that in order to fill the rectangular vessel, we will need an additional:

$(5000-1000)\text{ cm}^3=4000\text{ cm}^3$

Sincer 1000 cubic centimeters is 1 liter, this means that we will need four more liters of water in order to fill the rectangular vessel.

3 0

3 years ago

Read 2 more answers

Which statement is the converse of the following conditional? If it is raining, then the ground is wet.

Fiesta28 [93]

I’m pretty sure the answer is A.

7 0

3 years ago

A recent study was conducted to explore the relationship between the weight of a car and miles per gallon (gas mileage). A linea

k0ka [10]

Answer: a. iv. The weight of a car can be used to explain about 79.6% of the variability in gas mileage using a linear relationship.

b. ii. There is a fairly strong, negative relationship between car weight and miles per gallon.

Step-by-step explanation:

A coefficient of determination (denoted by R²) is a measure in a regression model that determines proportion of the variance in the dependent quantity that is predictable from the independent quantity.

It is square of correlation coefficient (R).

Here, independent quantity = weight of a car

dependent quantity = miles per gallon (gas mileage)

The coefficient of determination (R²) was reported to be 79.6%.

That means, The weight of a car can be used to explain about 79.6% of the variability in gas mileage using a linear relationship.

A correlation coefficient(R) tells about the strength and direction of relation .
It lies between -1 and 1.

For the study, the correlation coefficient R is -0.8921.

There is a fairly strong, negative relationship between car weight and miles per gallon.

7 0

3 years ago

How to find the height of a triangle when only given an angle and a side length.

Mice21 [21]

The height would be 13.5in

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3 years ago