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Anastasy [175]
3 years ago
9

Estimate the value of this expression by rounding each number to the nearest unit

Mathematics
1 answer:
Alina [70]3 years ago
3 0
So rounding to the nearest unit means replacing the number and taking the closest integer it is to. For example 0.96 is 1, and 5.45 is 5. So doing this in this prob. is 1 × 10 × 5, or 50.
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Kimberly makes a conjecture that the sum of two odd integers is always an even integer. Which choice is the best proof of her co
Gala2k [10]

Answer:

third choice : Let 2a + 1 be one odd number, and let 2b + 1 be the other odd number. (2a + 1) + (2b + 1) = 2a + 2b + 2 = 2(a + b + 1). Because 2(a + b + 1) is evenly divisible by 2, it is an even number.

You’re welcome ;)

7 0
3 years ago
A plumber's daily earnings have a mean of $145 per day with a standard deviation of $16.50.
avanturin [10]

Step-by-step explanation:

The plumber's daily earnings have a mean of $145 per day with a standard deviation of

$16.50.

We want to find the probability that the plumber earns between $135 and

$175 on a given day, if the daily earnings follow a normal distribution.

That is we want to find P(135 <X<175).

Let us convert to z-scores using

z =  \frac{x -  \mu}{ \sigma}

This means that:

P(135  \: <  \: X  \: <  \: 175) = P( \frac{135 - 145}{16.5}  \: <  \:  z \:  <  \frac{175 - 145}{ 16.5} )

We simplify to get:

P(135  \: <  \: X  \: <  \: 175) = P(  - 0.61\: <  \:  z \:  <  1.82 )

From the standard n normal distribution table,

P(z<1.82)=0.9656

P(z<-0.61)=0.2709

To find the area between the two z-scores, we subtract to obtain:

P(-0.61<z<1.82)=0.9656-0.2709=0.6947

This means that:

P(135  \: <  \: X  \: <  \: 175) =0.69

The correct choice is C.

7 0
3 years ago
Which of the following is an equivalent trig ratio for sin 60.
Liono4ka [1.6K]

Answer:

it sin 60

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
WILL GIVE BRAINLIEST
TEA [102]
Yes because 3² + 4² = 5²


to be sure

9 + 16 = 25

25 = 25
3 0
3 years ago
58° X x = degrees. Pls help!​
nika2105 [10]

Answer:

x=32 degrees

Step-by-step explanation:

We know 180 degrees in triangle

That box means 90 degrees so...

58+90=148

180-148=32

x=32 degrees

6 0
3 years ago
Read 2 more answers
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