Answer:
Ms. Basta saved $375, and the laptop was $875 after the 30% off.
To solve, use this equation: 2x-5=17
Add five to both sides to get 2x = 22
Divide both sides by 2 to get x=11
Step-by-step explanation:
(0.05)²
CHANGE 0.05 INTO SCIENTIFIC NOTATION
= (5 × 10^-2)²
SQUARE IT OFF EACH NUMBER
= 5² × (10^-2)²
=25 × 10^-4
=0.025
Answer:
0.969
Step-by-step explanation:
Given that:
Mean lifetime (m) = 520 hours
Variance = 900
Hence, standard deviation (s) = √900 = 30
Probability that bulb will last for at most 576 hours
X ≤ 576
Obtain the standardized score :
Using the relation :
Zscore = (x - m) / s
Zscore = (576 - 520) / 30
Zscore = 56 / 30
Zscore = 1.867
P(Z ≤ 1.867) : using the z probability calculator ;
P(Z ≤ 1.867) = 0.96905
Hence, P(Z ≤ 1.867) = 0.969
