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3 years ago

Round 7,954 to the place named.

Mathematics

2 answers:

Luden [163]3 years ago

8 0

Answer:

8.0

Step-by-step explanation:

Nimfa-mama [501]3 years ago

8 0

Answer:

8.0, 7.95, 8.0

Step-by-step explanation:

I don't know how I'm supposed to explain this but um. Yeah those are the answers

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A 29-meter ladder is sliding down a vertical wall so the distance between the top of the ladder and the ground is decreasing at

vitfil [10]

Complete question

A 29-meter ladder is sliding down a vertical wall so the distance between the top of the ladder and the ground is decreasing at 7 meters per minute. At a certain instant, the bottom of the ladder is 21 meters from the wall.

What is the rate of change of the distance between the bottom of the ladder and the wall at that instant(in meters per minute)

Answer:

$\frac{dx}{dt}=11.94m/min$

Step-by-step explanation:

From the question we are told that

Slant height $z=29m$

Change in Vertical height $\triangle y=7m/s$

Horizontal length $x=21$

Generally in finding the distance form the top to the bottom of the wall it is mathematically given by

$x^2+y^2=z^2$

$21^2+y^2=29^2$

$y^2=29^2+21^2$

$y=35.81$

Generally solving for the differential equation is mathematically represented as

$x^2+y^2=29^2$

$2x*\frac{dx}{dt} +2y*\frac{dy}{dt} =0$

$x*\frac{dx}{dt} +y*\frac{dy}{dt} =0$

$(21)*\frac{dx}{dt} +(35.81)*(-7) =0$

$(21)*\frac{dx}{dt} -250.64 =0$

$\frac{dx}{dt}=\frac{250.64}{21}$

$\frac{dx}{dt}=11.94m/min$

5 0

3 years ago

StartFraction 47 Over 39 EndFraction = StartFraction b Over 2 EndFraction

statuscvo [17]

Answer:

2.41

Step-by-step explanation:

Cross multiplication

47(2)=39b

94÷39=39b÷39

2.41=b

3 0

3 years ago

I need help on this asap

yaroslaw [1]

The answer is y=3/5x-2

3 0

3 years ago

Read 2 more answers

If c=3/5. then c-d= 1 1/5 wich is the value of c?

faust18 [17]

You already have the value of C, which is 3/5. If you are finding D, it is -8/5.

6 0

4 years ago

The overall grade of a course is based on homeworks, midterm exam, and final exam, where homework is 50%, midterm exam is 20%, a

makkiz [27]

Answer:

His overall grade is 87

Step-by-step explanation:

This grade is a weighed average.

The student got 88 on the homework. The homework is 50% of the grade.

The student got 80 on the midterm exam, that is 20% of the grade.

The student got 90 on the final exam, that is 30% of the grade.

His overall grade is:

G = 0.5*88 + 0.2*80 + 0.3*90 = 87

His overall grade is 87

7 0

4 years ago