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ira [324]
3 years ago
6

PLEASE HELP WITH BOTH WILL CROWN BRAINLIEST !!!

Mathematics
1 answer:
jekas [21]3 years ago
7 0
23)
the ring has a radius of 6mm and is 2 mm wide, so it has an outer ring at 7mm and an inner one at 5mm
to get the area subtract the inner ring from the outer, because of the hole:
outer=7²*π=49π
inner=5²*π=25π
ring area=outer-inner=49π-25π=24π= option C

24)circumference of a circle is c=2rπ

for the larger one: 2*20*π=40π
smaller one:2*15*π=30π

distance the larger wheel moves in 30 revolutions:
circumference*30=40π*30=120 π

revolutions of the smaller wheel by dividing the distance with the circumference:
120π/30π=40 revolutions=option H
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OLEGan [10]
If 648 equals 54%, then 1200 equals 100%.
8 0
3 years ago
the common ratio in geometric series is 0.5 and the first term is 256. what is the sum of the first 6 terms in the series?
melisa1 [442]

Answer:

501.76

Step-by-step explanation:

common ratio r = 0.5

first term a = 256

sum of G.p = Sn= a( r^n -1)/r-1

sum of the first 6 terms =

S6 = 256( 0.5^6 - 1)/ 0.5 - 1

= 256( 0.0156 - 1)/-0.5

= 256( -0.98)/-0.5

= - 250.88/-0.5

S6 = 501.76

7 0
3 years ago
Helppp<br> I really don't understand full explanation would be nice, please.
Dafna1 [17]

Step-by-step explanation:

y = mx + b.

y = -5/x -5

I hope this helps,

8 0
3 years ago
Please help S.O.S ASAP
Genrish500 [490]

Answer:

$40.95

Step-by-step explanation:

daniel earned 18.20 for working 2 1/3 hours

so he earned 18.20 / (2 1/3) for each hour of work

for 5 1/4 hours of work, he earned

= 18.20 / (2 1/3) x 5 1/4

= $40.95


4 0
3 years ago
Read 2 more answers
PLS HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
igomit [66]

Answer:

42

Step-by-step explanation:

Set the numbers in order from least to greatest, then find the one in the middle, which will be the median.

19, 23, 42, 56, 67

42 is in the middle, so it is the median.

4 0
4 years ago
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