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umka21 [38]
2 years ago
10

Timed test

Mathematics
1 answer:
marysya [2.9K]2 years ago
4 0

Answer:

The correct answer should be 5,130

Step-by-step explanation:

the 3 in 513 is in the ones place, if it were ten times greater than 3 that would be 30, or a 3 in the tens place, the 3 in the number 5,130 is in the tens place, making that the correct choice

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The number of three-digit numbers with distinct digits that can be formed using the digits 1, 2, 3, 5, 8, and 9 is . The probabi
Tems11 [23]

Answer:

1/15

Step-by-step explanation:

When we form such three-digit numbers with distinct digits using the digits  1 , 2 , 3 , 5 , 8  and  9  (in all six digits all different), observe that the order of digits does matter. For example, if we make a number using digits  1 , 2 ,  and  3 , we can have  123 , 132 , 231 , 213 , 312  or  321 .

Hence we have to find number of  3  digit numbers that can be made from these six digits using permutation and answer is ⁶ P ₃ =  6  ×  5  ×  4  =  120 .

.How haw many of them will have first digit as even, we have two choices  2  and  8 . Once we have chosen  2

for hundreds place, we can have only  8  in units place and any one of remaining  4  can be used in tens place. Hence four choices, with  2  in hundreds place and another four choices when we have  8  in hundreds place (and  2  in units place) i.e. total 8  possibilities.

Hence, the probability, that both the first digit and the last digit of the three digit number are even numbers, is  8  /120  =  1 /15

.

4 0
2 years ago
<img src="https://tex.z-dn.net/?f=f%28x%29%3D%281%2Fx%5E%7B2%7D%20-3%2Fx%5E%7B4%7D%20%29%28x%2B5x%5E%7B3%7D%29" id="TexFormula1"
polet [3.4K]
That’s the answer:)!

7 0
2 years ago
A cylindrical piece of iron pipe is shown below. The wall of the pipe is 0.75 inch thick, and the pipe is open at both ends:
Gnesinka [82]

Answer:

(A)398 cubic inches

Step-by-step explanation:

Given a cylindrical piece of iron pipe with the following dimensions:

  • Height = 12 inches
  • Diameter = 8 inches

Therefore: External radius =4 Inches

Since the wall of the pipe is 0.75 inch thick,

Internal Radius =4-0.75 =3.25 Inches

Volume of a Cylinder = \pi r^2 h

Inside Volume of the Pipe

= \pi*3.25^2*12\\=398$ cubic inches

The correct option is A.

6 0
3 years ago
PLEASE HELP!!!!!! I'M IN A TEST SO PLEASE DON'T GUESS!!!!!
djyliett [7]

Answer:

B

Step-by-step explanation:

i added them all & its 100

7 0
2 years ago
Read 2 more answers
If 1/2 = 32/d what is d first answer gets brainerlist
Scilla [17]

Answer:

D would be equal to 64

You just need to multiply 32 by 2

4 0
3 years ago
Read 2 more answers
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