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damaskus [11]
3 years ago
7

The life of a certain brand of battery is normally distributed, with mean 128 hours and standard deviation 16 hours. What is the

probability that a battery you buy lasts at most 100 hours? Standardize the variable.
Mathematics
1 answer:
Katyanochek1 [597]3 years ago
7 0

Answer:

x = 100 is equivalent to z = -1.75

Step-by-step explanation:

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A,b and c form a triangle where BAC= 90 degrees, AB= 13mm and CA= 9.7mm. Find length of BC
kkurt [141]

Answer:

7.2mm

Step-by-step explanation:

6 0
2 years ago
Lnes made9 necklaces with 60 beads on each necklaces. How many beads did she use in all
Gala2k [10]
Made 9  necklaces.
60 beads per necklace.
How many beads for all the 9 necklaces?

60 × 9 = 540

9 necklaces = 540 beads<span />
3 0
2 years ago
Based on the graph, how many students in a class of 180 students would have green as their eye color
kozerog [31]

Answer: look up alaskan pipeline

Step-by-step explanation:

5 0
2 years ago
Please I need help asap!!
Solnce55 [7]

Answer:

B

Step-by-step explanation:

Hi there!

We're given the measure of <AOC (the big angle) as 90°

and the measure of <BOC as 14° and the measure of <AOB as (3x+46)°

we want to find the value of what x is

because of angle addition postulate, m<AOC=m<BOC+m<AOB

so we can substitute our known values into that equation

90°=14°+3x°+46°

our goal is to isolate the variable of x onto one side

add 14 and 46 together

90°=3x°+60°

subtract 60° from both sides

30°=3x°

divide both sides by 3

10°=x

therefore B is your answer

Hope this helps!

7 0
3 years ago
I need help on this???
Aliun [14]
Use the geometric mean for right triangles here.  Like this \frac{9}{y}= \frac{y}{7}.  Cross multiply to get y^{2}=63, and y= \sqrt{63}.  That simplifies down to y= \sqrt{9*7}.  Pull out the 9 as a perfect square of 3 and you're left with y=3 \sqrt{7}, first choice above.
4 0
3 years ago
Read 2 more answers
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