Answer:
23
Step-by-step explanation:
F=(9/5)c + 32
F=(9/5)(-5) + 32
F=(-9) + 32
F=23
Answer:
1.653
Step-by-step explanation:
Write log45 as a product of its prime factors
log45= log3^2 * log5
Substitute the given logarithms to the respective numbers.
Remember the laws of logaarithms that * changes to +
log 45 = 0.477*2 + 0.699
You will find that log 45 = 1.653
Answer
given,
installed electric lamp = 2000
average life = 1000 hrs
standard deviation = 200 hrs
a)
let after p hors 10% bulb fails ,
P(X<p) = 0.10
from Normal distribution table,
P(Z<-1.28) = 0.10
on comparing
x = -1.28 x 200 + 1000
x = 744 hours
b) P( 900 < X < 1300) =
=
= P(-0.5 < Z < 1 .5)
= P(Z<1.5) - P(Z<-0.5)
= 0.93319 - 030854
= 0.62465
lamps may be expected to fail between 900 and 1300
= 0.62465*2000
= 1249.3
= 1249 (approx)
Answer:
w=-6
Step-by-step explanation:
5w+6=9w+30
-9w -6 . -9w -6
-4w =24
Divide -4 on both sides
w= -6
Answer:5 x a
Step-by-step explanation: