Answer:
C
Step-by-step explanation:
Natural numbers are numbers which are positive whole numbers greater than 0. This includes 1, 2, 3, ...etc.
To determine, solve each equation.
A. x=0
B. x = 1/3
C. x=3
D. x=-4, 4
Only C is a natural number.
Answer: (-5x2 - 8x + 7) - (5x2 - 4)
Step-by-step explanation:
= -5x2 - 8x + 7 - 5x2 + 4
= -5x2 - 5x2 - 8x + 7 + 4
= -10x2 – 8x + 11
Answer: = (-5x2 - 8x + 7) - (5x2 - 4)
Answer:
She sold 10 cups per hour
Step-by-step explanation:
To find the number per hour, divide the total sold by the total number of hours.
20 cups/2 hours = 10 per hour
Answer:
-2 + 2.3 - 11 = -4
Step-by-step explanation:
yall need to learn more in class
The half-life of Po is 139 days, so its decay rate is
0.5 = e^(139k) ==> k = ln(0.5)/139
After some time t, 80% of the material will have decayed and you'll be left with a sample 20% of its original mass:
0.2 = e^(kt) ==> t = ln(0.2)/k = ln(0.2)/ln(0.5) * 139 = 322.748
so your sample is usable for about 323 days.
