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svlad2 [7]
3 years ago
7

Julie and Eric row their boat (at a constant speed) 18 miles downstream for 3 hours helped by the current. Rowing at the same ra

te, the trip back against the current takes 6 hours. Find the rate of the boat in still water
Mathematics
1 answer:
svp [43]3 years ago
5 0

Answer:

answer: the crews rowing rate is 6 mph and the rate of the current is 3 mph

Step-by-step explanation:

v the crew rowing rate

u rate of the current

downstream  v + u = 13.5/1.5 = 9 mph

upstream      v - u = 13.5/4.5 = 3 mph

u = 9 - v

v - ( 9 - v ) = 3

v - 9 + v = 3

2 v = 12

v 6 mph,   u 9 - 6 = 3 mph

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If the black cloth absorbs heat energy, why was the ice cube at room temperature covered with the black cloth the slowest to mel
lozanna [386]
The cloth acts as insulation it doesn't matter the colour . And as to Black cloth attracting Heat this is only partially true if you put a black cloth in the room with no windows and the temperature of the room was 70° the cloth will not get any hotter black cloth absorbs infrared energy this makes it feel warmer
5 0
3 years ago
A manufacturing company with 450 employees begins a new product line and must increase their number of employees by 18%. How man
____ [38]

The total employees the company now have is 531.

Solution:

Beginning employees in a company = 450

Percentage of employees increased = 18%

Number of increased employees = 18% of 450

                                                       $=\frac{18}{100}\times 450

                                                       = 81

Total employees = Beginning employees + Increased employees

                            = 450 + 81

                            = 531

The total employees the company now have is 531.

3 0
3 years ago
Find the area of the shaded regions. Give your answer as a completely simplified exact value in terms of π (no approximations).
Elan Coil [88]

Answer:

(40/3)*pi

Step-by-step explanation:

lets first find the area of the little circle

A=pi*r^2

A=pi*3^2

A=9pi

Now, lets find the area of the big circle

A=pi*r^2

A=pi*(3+4)^2

A=pi*7^2

A=49pi

now lets subtract the area of the little circle from the area of the big circle

49pi-9pi=40pi, now we found the area of the "bagel)

lets find what portion of the bagel is the shaded region

120/360=1/3

now lets multiply the bagel area by the fraction

40pi*(1/3)=

(40/3)*pi   or  (40*pi)/3

4 0
3 years ago
A 16 ounce box of cereal is priced at $3.68. Find the cost per ounce *
ZanzabumX [31]

Answer:

0.23$

Step-by-step explanation:

16 ounce box of cereal is priced at =3.68$

∴1 ounce box of cereal is priced at=(3.68/16)$

                                                         =0.23$

6 0
3 years ago
Ramon is a waiter. He waits on a table of 4 whose bill comes to $99.69. If Ramon receives a 20% tip, approximately how much will
vlabodo [156]
99.69/100=.9969
.9969*20=19.938 
Ramon would receive ~ $19.94
4 0
3 years ago
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