Answer:
C. 3x^2 + 2x + 1
Step-by-step explanation:
A. 12^2 - (4*3*12) = 0 (there's one solution.)
B. (-3)^2 - (4*3*-18) = 255 (there're 2 real solutions.)
D. 3^2 - (4*0*-3) = 9 (there're 2 real solutions.)
C. 2^2 - (4*3*1) = -18 ✅✅
if b^2 - 4ac = negative then we can say that there isn't any real solution for the equation.
Answer:
$-107
Step-by-step explanation:
From the problem we know the probability of randomly selecting a person alive throughout the year: 0.9989
Now, the probability that a person does NOT live would be the complement, that is:
1 - 0.9989 = 0.0011
Now to know the real value of the policy, we must first subtract what he paid for it, that is:
80000 - 195 = $ 79805
Now, to know what the value waiting for that person would be the subtraction of the real value that will be gained by the probability of not living, less what the policy payment for the probability of surviving, thus:
0.0011 * 79805 - 0.9989 * 195 = -107
Which means this man is actually losing $ 107
Answer:
1.8 km
Step-by-step explanation:
The scale on the map is 1 : 15000.
This means that every 1 cm on the map is equal to 15000 cm on the ground.
12 cm on the map will therefore be:
12 * 15000 = 180000 cm
Let us convert to kilometres:
100000 cm = 1 km
180000 cm = 180000 / 100000 = 1.8 km
12 cm on the map will be 1.8 km on the ground.
Earning = 1000 + 25% commison
For sales of $2170:
= 1000 + 25%* 2170
= 1000 + 542.5 = 1542.5
Gross earnings = $1542.50
