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3 years ago

Plecorato de potasio es elemento

Mathematics

1 answer:

Montano1993 [528]3 years ago

5 0

Answer:

no es un elemento de la tabla periódica

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LIEDUMICIS.ISLIULIULUI marks 4 1 point → An archer shoots an arrow into the air. The equation that describes the path of the arr

elena55 [62]

the arrow touches the ground when the heigth is 0

so we need to replace h=0 and solve for t

$\begin{gathered} h=17t-5t^2 \\ 0=17t-5t^2 \\ 0=t(17-5t) \\ 0=17-5t \\ 5t=17 \\ t=\frac{17}{5}=3.4 \end{gathered}$

the arrow tuches the ground at 3.4 seconds

$F=m\times a$

replacing

$185=m\times13.7$

solve for m

$\begin{gathered} m=\frac{185}{13.7} \\ \\ m=13.50 \end{gathered}$

the mass is 13.50Kg

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1 year ago

Ashley wants to divide her 63 shirts into two groups, so that the ratio of the number of shirts in the first group to the number

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27 in the first group, 36 in the second. Here's the work: Divide 63 by 7 (3 parts plus 4 parts) equals 9. Multiply 9 by 3 for the first group and you get 27, multiply 9 by 4 for the second group to get 36.

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4 years ago

__•__=42 __+__=23 Can someone help me solve this?

RoseWind [281]

Answer:

21 * 2 = 42

21 + 2 = 23

Step-by-step explanation:

well I know that 6 * 7 = 42 so I’m assuming that’s correct

Then 11 + 12 = 23 it could be the answer I’m not positive for this one though.

The first one should be correct.

Maybe try

21 * 2 = 42

21 + 2 = 23

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2 years ago

You need 2 eggs for a muffin recipe that makes 12 muffins.

geniusboy [140]

Answer:

you need 6 eggs to make 32 muffins

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3 years ago

Suppose that the mean and standard deviation of the scores on a statistics exam are 78 and 6.11, respectively, and are approxima

kiruha [24]

Answer:

0.7422 = 74.22% of scores are above 74.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 78, \sigma = 6.11$

Calculate the proportion of scores above 74.

This is 1 subtracted by the pvalue of Z when X = 74. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{74 - 78}{6.11}$

$Z = -0.65$

$Z = -0.65$ has a pvalue of 0.2578

So 1-0.2578 = 0.7422 = 74.22% of scores are above 74.

8 0

4 years ago

Plecorato de potasio es elemento​

Plecorato de potasio es elemento