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valina [46]
2 years ago
15

42 less than the product of 28 and an unknown number is 154 what is the value of the unknown number

Mathematics
2 answers:
Degger [83]2 years ago
5 0
154+42=196. 196/28=7. :D
ycow [4]2 years ago
3 0
196,7 hope this helps✌✌✌✌
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A well of diameter 4m is dug 14m deep. The earth taken out is spread evenly all around the well to form a 40cm high embankment.
dimulka [17.4K]

Answer:

82.72m

Step-by-step explanation:

Volume = πr2h

= 3.142*7*7*14

= 2,155.41m³

Now that we hav the volume of earth, we go on to find the raduis of the spread

2155.41m³ = 3.142*r²*0.4

2155.41m³ = 1.26r²

r² = 1,710.64

r = 41.36m

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8 0
3 years ago
Which is the product of 7/9 and 6 in a fraction number
PIT_PIT [208]

Answer:

4 2/3

Step-by-step explanation:

7/9 multiplied by 6/1 = 42/9

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3 0
2 years ago
Calculate the length of CD give your answer to 3 significant figures.
Westkost [7]

12.7  
Using the Pythagorean theorem, you can easily calculate the length of BC.
So: 
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Now consider triangle BCD. You know all three angles and one side. Using the law of sines you know that ratio of the sine of each angle over the opposite side is constant. So: 
BC/sin(55) = CD/sin(90) 
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sin(90)BC/sin(55) = CD 
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BC/sin(55) = CD 
10.39230485/0.819152044 = CD 
12.68666167 = CD 
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5 0
2 years ago
HI, can someone help me? volume of the square
Leokris [45]

Answer - 288

Step-by-step explanation:

i use the formula V=a2 h/3

3 0
3 years ago
Read 2 more answers
I’m stuck on g. and h.
natulia [17]

5000+0=5000 that is g

and then 0+100=100-20=80 that is h

7 0
3 years ago
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