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Margaret [11]
2 years ago
7

Below is a list of equations and expressions.

Mathematics
2 answers:
pogonyaev2 years ago
6 0
B: 3 and 4 because they both do not have an = sign
zvonat [6]2 years ago
4 0

Answer:

The answer is B.

Step-by-step explanation:

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In a class of 32 students, the mean height of the 14 boys is 1.56 meters, the mean height of all 32 students is 1.515. Work out
vaieri [72.5K]

Answer:

I'm not sure but I did do it on a calculator so 1.515-1.56= -0.045

6 0
3 years ago
0.005 write as a fraction
kirill115 [55]
0.005 would be 5/1000 because how I know if it is 10ths or 100ths or 1000ths I count all the number on the right side of the decimal, hoped this could help!
5 0
3 years ago
Read 2 more answers
What am I doing wrong
stiv31 [10]
For this answer it is:

12 inches = 36 feet
7 0
3 years ago
A certain brand of flood lamps has a lifetime that is normally distributed with a mean of 3,750 hours and a standard deviation o
vesna_86 [32]
Given that mean=3750 hours and standard deviation is 300:
Then:
<span>a. The probability that a lamp will last for more than 4,000 hours?
P(x>4000)=1-P(x<4000)
but
P(x<4000)=P(z<Z)
where:
z=(x-</span>μ)/σ
z=(4000-3750)/300
z=0.833333
thus
P(x<4000)=P(z<0.8333)=0.7967
thus
P(x>4000)=1-0.7967=0.2033

<span>b.What is the probability that a lamp will last less than 3,000 hours?
P(x<3000)=P(z<Z)
Z=(3000-3750)/300
z=-2.5
thus
P(x<3000)=P(z<-2.5)=0.0062

c. </span><span>.What lifetime should the manufacturer advertise for these lamps in order that only 4% of the lamps will burn out before the advertised lifetime?
the life time will be found as follows:
let the value be x
the value of z corresponding to 0.04 is z=-2.65
thus
using the formula for z-score:
-2.65=(x-3750)/300
solving for x we get:
-750=x-3750
x=-750+3750
x=3000</span>
7 0
3 years ago
Based on what you know now, how are linear and exponential functions alike?
Ainat [17]

Answer:

They're similar in that they both have to maintain a steady rate of rise as they grow. While graphing, you can't adjust the slope or exponent after traveling up a graph.

Step-by-step explanation:

5 0
2 years ago
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