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Bad White [126]
4 years ago
14

The time t required to drive a certain distance varies inversely with the speed r. If it takes 4 hours to drive the distance at

35 miles per hour, how long will it take to drive the same distance at 45 miles per hour?
About 3.11 hours
140 hours
about 5.14 hours
393.75 hours
Mathematics
1 answer:
krok68 [10]4 years ago
3 0
It will take about 3.11 hours to drive 45 miles  
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The ratio of the side lengths of a quadrilateral is 2:3:5:6 and its perimeter is 48 cm. What is the length of the longest side?
Alex17521 [72]
The side lengths are given in proportions which are 2:3:5:6. The perimeter is given as the sum of all the sides which is given as 48 cm. Using ratio and proportion, the sum of all the sides or the perimeter is proportional to the sum of all the fractions and the largest fraction is proportional to the longest side of the quadrilateral. 

Let x be the longest side of the quadrilateral. The largest proportion is 6. 
6/(2+3+5+6) = 6/16
6/16 = x/48

x= 18 cm. The longest side is 18 cm. The other sides are 6, 9, 15 using the other proportions.



5 0
3 years ago
What is the volume of this cylinder?
katrin [286]

Answer:

678.24 in³

Step-by-step explanation:

radius r = 6 in

height h = 6 in

volume V = 678.24 in³

lateral surface area L = 226.08 in²

top surface area T = 113.04 in²

base surface area B = 113.04 in²

total surface area A = 452.16 in²

In Terms of Pi π

volume V = 216 π in³

lateral surface area L = 72 π in²

top surface area T = 36 π in²

base surface area B = 36 π in²

total surface area A = 144 π in²

Agenda: r = radius

h = height

V = volume

L = lateral surface area

T = top surface area

B = base surface area

A = total surface area

π = pi = 3.1415926535898

√ = square root

Calculate volume of a cylinder:

V = πr²h

3 0
4 years ago
3. The stem-and-leaf plot shows the cost of lamps at a department store.
77julia77 [94]

Answer:

(a) What is the median cost?
12-78

(b) Is there a mode? If so, what is it?

No there isn't

(c) What is the difference between the most expensive and least expensive lamps?

12,75-78

(d) How many lamps cost more than $20 but less than $40?

5

(e) What is the ratio of lamps that cost less than $40 to lamps that cost more than $40? Write the ratio in the simplest form.

{for less} - (12,49)   {for more} - (49,78)

Step-by-step explanation:

hope I helped if it's wrong tell me

~Ally

3 0
2 years ago
PLEASE HELP!! Only answer if you are sure though.
brilliants [131]

Answer:

6x

Step-by-step explanation:

Product means to multiply

3 0
3 years ago
A group of 841 square tiles are arranged as a large square on a wall. How many tiles are on each row
I am Lyosha [343]
Given square tiles = 841 .

Number of rows =

\sqrt{841}  =  \sqrt[2]{29 \times 29}  =  29
= 29 rows!!

The number of Rows = 29 .

Thanks !!
6 0
3 years ago
Read 2 more answers
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