Answer:
Option D (APEX)
Step-by-step explanation:
L= Student has lice
NL= Student has no lice
PT=Test Shows positive
NT=Test Shows negative
P(
) =0.7708 (Probability that a student has no lice and the test shows negative)
P(
) = 0.0108 ( Probability that a student has lice and the test shows negative)
= 
- 0.98618219 (Simplify)
<u> Terms Of Percentages</u>
0.98618219 × 100
=98.6
Therefore your answer is 98.6% (Option D)
APEX
Answer:
1/4
Step-by-step explanation:
The sentence "15% of 4x is 20 less than x"
translates to 0.15 • (4x) = x – 20
Solving that…
0.15(4x) = x - 20 multiplipy 0.15•4
0.6x = x - 20 subtract x from both sides
-0.4x = - 20 divide both sides by -0.4
x = 50
30 times 30 plus 45 minus 456 is 489
