Help plz I really don't get it
1 answer:
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Answer:
4.50
Step-by-step explanation:
sin 40°= opposite/hypotenuse
sin 40°= opp/7
0.6428= opp/7
multiply both sides by 7
4.4996= opp
to nearest hundredth = 4.50
Answer: 0.1359
Step-by-step explanation:
mean = $400
Standard deviation = $50
Since the wages is normally distributed , the first thing is to find the z - score.
z =
finding the z - value for 300 and 350 , we have
z =
z =
2 = -2
also
z =
z =
z = -1
The next thing is to check the calculated value on z - table.
From z - table :
P (z -2 ) = 0.0228
P ( z ) = 0.1587
combining the two
P ( -2z
-1 ) = 0.1587 - 0.0228
P ( -2z
-1 ) = 0.1359
Therefore , the the probability that a worker
selected at random makes between
$300 and $350 = 0.1359
Answer:
<h2>19.95 ≅ 20 boards will be required.</h2>Step-by-step explanation:
The pieces have to be =
feet long.
A total number of 38 pieces are needed to cut.
In order to make 38 pieces total required length is =
= 199.5
1 board is 10 feet long, hence total requirement of board is = 19.95