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3 years ago

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George was weighed at the doctor's office. The scale read 67.20 pounds. The doctor wrote 67.3 pounds on George's chart. Did the

doctor make a mistake? If he did explain.

1 answer:

EleoNora [17]3 years ago

6 0

Yes, the doctor made a mistake. He should have wrote 67.2 pounds on George's chart. Because when rounded it would be 67.2.

Hope this helps.

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A certain four-cylinder combination lock has 50 numbers on it. to open it, you turn to a number on the first cylinder, then t

kumpel [21]

A certain four-cylinder combination lock has 50 numbers on it.

It is a four cylinder combination lock

Each cylinder has 50 numbers

So we have to choose 4 numbers for 4 cylinders

_____ , ______ , ______, _____

you turn to a number on the first cylinder

We have 50 numbers so we have 50 combinations

__50___ , ______ , ______, _____

Repetitions are allowed so we do the same for remaining three

50 , 50 , 50 , 50

50 * 50 * 50* 50 = 6250000

There are 6250000 different lock combinations .

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3 years ago

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the flag pole in front of the school casts a shadow 40 feet long when the measurement of the angle of elevation to the sun is 31

san4es73 [151]

Answer:

I would say that the flag pole is about 120 feet long. Recall that this is an estimation.

Step-by-step explanation:

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3 years ago

WILL MARK BRAINLIEST:

Bas_tet [7]

Answer:

The answer to your question is: y = -2x + 10

Step-by-step explanation:

Data

Point = (1, 8)

Line y = x/2 + 3

perpendicular

slope = 1/2 but the lines are perpendicular, then slope = -2

Equation

( y - y1) = m ( x - x1)

(y - 8) = -2(x - 1)

y - 8 = -2 x + 2

y = -2x + 2 + 8

y = -2x + 10

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3 years ago

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Josh is clumsy and often drops his

marusya05 [52]

It is definitely worth it for Josh to purchase a warranty. If he buys something and then breaks it within the amount of time the warranty covers, then he would be able to get a new one.

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2 years ago

In testing a certain kind of missile, target accuracy is measured by the average distance X at which the missile explodes. The d

3241004551 [841]

Answer:

The answer is c) 761.0

Step-by-step explanation:

Mathematical hope (also known as hope, expected value, population means or simply means) expresses the average value of a random phenomenon and is denoted as E (x). Hope is the sum of the product of the probability of each event by the value of that event. It is then defined as shown in the image, Where x is the value of the event, P the probability of its occurrence, "i" the period in which said event occurs and N the total number of periods or observations.

The variance of a random variable provides an idea of the dispersion of the random variable with respect to its hope. It is then defined as shown in the image.

Then you first calculate E [x] and E [ $x^{2}$ ], and then be able to calculate the variance.

$E[x]=0*\frac{1}{40} +10*\frac{1}{20} +50*\frac{1}{10} +100*\frac{33}{40}$

$E[x]=0+\frac{1}{2} +5+\frac{165}{2}$

E[X]=88

So <em>E[X]²=88²=7744</em>

On the other hand

$E[x^{2} ]=0^{2} *\frac{1}{40} +10^{2} *\frac{1}{20} +50^{2} *\frac{1}{10} +100^{2} *\frac{33}{40}$

E[x²]=0+5+250+8250

<em>E[x²]=8505 </em>

Then the variance will be:

Var[x]=8505-7744

<u><em>Var[x]=761 </em></u>

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3 years ago