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alexandr1967 [171]
2 years ago
3

Simplify 21 hours 99 minutes.

Mathematics
2 answers:
Alex2 years ago
6 0
22 hours and 39 minutes
Alecsey [184]2 years ago
6 0

Answer:

22 hours 39 minutes

Step-by-step explanation:

To simplify the expression, we must know the relationship between minutes and hours.

Since 60 minutes make 1 hour, then 99 minutes will be equivalent to

= 99/60

= 1.65 hours

= 1 hour 39 minutes

As such,

21 hours 99 minutes

=  21 hours + 1 hours 39 minutes

= 22 hours 39 minutes

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What is the 185th digit in the following pattern 12345678910111213141516...?
Natalka [10]
1-9  = 9 digits
10-99 = 180 digits
So if we continue the pattern to 99, there are 189 digits, and the last 5 digits would be 79899.  Counting backwards: 189th = 9, 188th = 9, 187th = 8, 186th = 9, 185th = 7.

The 185th digit is 7.

4 0
2 years ago
A train station has installed a system for determining whether bags contain explosives. It has a 95% chance of correctly identif
astraxan [27]

Answer:

a) P(identified as containing explosives)=P(actually contains explosives and identified as containing explosives)+P(actually not contains explosives and identified as containing explosives)

=(10/(4*106))*0.95+(1-10/(4*106))*0.005 =0.005002363

hence  probability that it actually contains explosives given identified as containing explosives)

=(10/(4*106))*0.95/0.005002363=0.000475

b)

let probability of correctly identifying a bag without explosives be a

hence a =0.99999763 ~ 99.999763%

c)

No as even if that becomes 1 ; proportion of true explosives will always be less than half of total explosives detected,

3 0
2 years ago
Suppose c and d vary inversely, and d = 2 when c = 17.
balu736 [363]

Answer:

c = 34/d

d = 1/2

Step-by-step explanation:

Part A

Basic Formula

c = k/d

17 = k/2         Multiply both sides by 2

17*2 = k*2/2     Combine

34 = k

So the equation is c = 34/d

Part B

c = 68

k = 34

d = ?

68 = 34/d               Multiply both sides by d

68*d = 34 * d/d      Simplify.

68 d = 34                Divide by 68

d = 34/68                Simplify

d = 1/2

5 0
2 years ago
ΔXYZ was dilated, then _____________, to create ΔQAG.
V125BC [204]

Answer:

reflected

Step-by-step explanation:

ΔXYZ was dilated, then reflected, to create ΔQAG.

7 0
2 years ago
Read 2 more answers
Amad was curious if triangles \triangle ABC△ABCtriangle, A, B, C, and \triangle EDF△EDFtriangle, E, D, F were congruent. He was
11111nata11111 [884]

Answer:

There is no error, Amad is correct.

Step-by-step explanation:

Khan Academy Checked.

3 0
2 years ago
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