Answer:
2.28 %
Step-by-step explanation:
It is stated that battery life distribution is normal. First we need to find out where 65 hour battery life in this distribution falls by finding its z-score. We can use the following formula
z(x)=
where
- X the point we are looking to find its z-score, which is 65
- M is the mean of the sample, which is 75
- s is the standard deviation of the sample, which is 5
Replacing these numbers in the formula, z-score of the 65 hour battery life :
z(x)=
=-2
All the batteries fail within the first 65 months if their z-score is smaller than -2. Or we can state this also as: P(z≤-2) which is 0.0228
Thus 2.28 % of the batteries will fail within the first 65 months of use.
Answer:
A is Survey
B is Study
C is Expieriment
Step-by-step explanation:
Answer triangle RST is congruent to the triangle LMK
If you move the triangle vertically you can find the congruency of two sides and one angle
<span>The fifth power of ten would not be represented.
Each individual digit would be shown as a power of ten.
982 would be the sum of:
9 times 100. (100 is 10 to the second power)
plus
8 times 10. (10 is 10 to the first power.)
plus
2 times 1. (I is 10 to the zero power.)
The only significant digit represented by a zero is the "hundred thousands"
(100,000 is 10 to the fifth power.)</span>
Answer:
50% profit
Step-by-step explanation:
Cost price = £ 5000
Selling price = £ 7500
Profit = Selling price - cost price
= 7500 - 5000
= £ 2500
Profit percentage = 
= 50 %
