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aksik [14]
3 years ago
12

กรวยโลหะตันสูง 27 cm ถูกตัดในแนวระนาบที่ขนานกับฐานเป็น 3 ส่วน โดยแต่ละส่วนสูงเท่ากัน เมื่อนำส่วนที่ 2 มาหลอมเป็นทรงกลมรัศมี 7 cm

ปรากฏว่าได้โลหะทรงกลม 4 ลูกพอดี กรวยโลหะตันนี้มีรัศมีของฐานยาวเท่าใด
Mathematics
1 answer:
alexdok [17]3 years ago
5 0
What ..........................................................................
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Help me please , number 3 !
Triss [41]
D.) y= 0.3x

This is because slope is change in y over change in x, so we get 3/10 which is equivalent to 0.3
3 0
3 years ago
a fisherman travels 9mi downstream with the current in the same time he travels 3 mi upstream against the current. if the speed
netineya [11]

Answer:

10 mph

Step-by-step explanation:

speed of boat in still water = x

speed of current = 5

speed of boat with current (downstream) = x + 5

speed of boat against current (upstream) = x - 5

distance downstream = 9

distance upstream = 3

time = t

speed = distance/time

distance = speed × time

downstream:

9 = (x + 5)t

upstream:

3 = (x - 5)t

9 = xt + 5t

3 = xt - 5t

9 = xt + 5t

-3 = -xt + 5t

-----------------

6 = 10t

t = 0.6

9 = (x + 5)0.6

15 = x + 5

x = 10

5 0
2 years ago
Pls help I’ll brainlest ASAP
Burka [1]
So, and, but, but, or, nor, so. Im pretty sure this is correct.
5 0
3 years ago
Find the distance between G(-8,6) and H(5, 10). Round to the nearest tenth (one decimal place) if necessary.
Darya [45]

Answer:

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3 0
3 years ago
Write the next three numbers in the three numbers in the sequence:0.4, 1.2, 3.6, 10.8
wolverine [178]
The rule is 3x
so to find the next number you multiple the most recent one by 3
the next three are:
32.4, 97.2, 291.6
4 0
4 years ago
Read 2 more answers
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