Answer:
A) probability that at least x of them will require repairs is less than 0.5 is 4
Step-by-step explanation:
sample size, n = 20
p = success probability of toaster = 0.2
q = failure probability of toaster =1- p = 1- 0.2 =0.8
mean, , μ = n * p = 20 * 0.2 = 4
standard deviation, 
a) the probability that at least some of them require repairs < 0.5.
for 
value of z = 0
we know 
from z table
X = 4
B) SECOND PART IS INCOMPLETE { DATA IS INCOMPLETE}
Take a better picture for me
Answer:
1608.5mm²
Step-by-step explanation:
the formula to it is π r²h so 8 times itself or the radius and times it with pi so it equals to 201.0619298297. then you times it with 8 aka the height and you get 1,608.4954386376. then you round it and you get 1608.5.
Answer:
B
Step-by-step explanation:
7x-4 is two times 2.5x+4
Answer:
Breadth = 15 cm
Step-by-step explanation:
Area = length x breadth
315 = 21 x breadth
[ dividing both sides by 21 ]
