Grace, Chelsea, and Roan are simplifying the same polynomial expression. Which

What is the difference between 15.0 and 20.0

mariarad [96]

Answer:

5

Step-by-step explanation:

Im not sure if you mean subtraction but if you find the difference im pretty sure you take 20.0 subtract 15.0 from it giving you the answer 5 or 5.0 im not that good with decimals sorry

5 0

3 years ago

In the children’s game Don’t Break the Ice, small plastic ice cubes are squeezed into a square frame. Each child takes a turn ta

guajiro [1.7K]

Answer:

(29.46 mm, 29.54 mm).

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 43 - 1 = 42

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 42 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.95}{2} = 0.975$ . So we have T = 2.018

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 2.018\frac{0.12}{\sqrt{43}} = 0.04$

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 29.5 mm - 0.04mm = 29.46 mm

The upper end of the interval is the sample mean added to M. So it is 29.5 mm + 0.04mm = 29.54 mm

The 95% confidence level for the true mean width is: (29.46 mm, 29.54 mm).

5 0

3 years ago

2/3 + _/6 = 1/6 what is the missing numerator options: 3 5 6 9

Blababa [14]

Answer:
This question is not possible unless the plus sign is actually a minus sign.

Explanation:
First we need to find the LCM, lowest common multiple , for the faction which is 6. Because 3x2 is 6 and 6x1 is 6. So since we mutiply the bottom of the faction 2/3, we need to muitiply the 2 too, which is 6. But....
6 plus 3 or anyone of your option listed wouldn’t be equaled to 1.
So that’s why I don’t think this question is possible to answer.
But... if that sign was a negative the answer would be 5 because 6-5 is 1.

Fun Fact:
The word Fraction comes from the Latin word fractio which means 'to break'.

I hope this helped and have a nice day

7 0

3 years ago

An inverted pyramid is being filled with water at a constant rate of 50 cubic centimeters per second. The pyramid, at the top, h

geniusboy [140]

Answer:

dh=30.25 cm/sec

Step-by-step explanation:

1. the first recommend step is to make a sketch of the situation. We draw the triangle representing the pyramid and we label the sides. (as the picture attached)

2. What we need to find is the change of the height of the water with respect the time (dh/dt), so we need to find an equation that allow us to find that. We start with the equation of the volume of the pyramid which is $V=\frac{b^2h}{3}$ . To find (dh/dt) it is necessary to take the derivative of this equation, however, the equation involves two variables (b and h). We only can derive if the equation is in terms of only one variable. therefore, we need to find another equation to do this.

3. Applying ratios of triangle, we can find and expression that relates b with h. To apply this ratio, it is necessary to split the triangle drawn in step 1, so we will form a right triangle. To apply the ratio of triangle we follow the next formula: $\frac{height1 }{base1} =\frac{height2}{base2}$