Each postcard cost $0.24
15 postcards would cost $3.60
0.24x15=360
Move the decimal point and you have $3.60
Answer: (a) y = 250(1.8)ˣ (b) 89,262 bacteria
<u>Step-by-step explanation:</u>
Use the exponential growth formula y = a(b)ˣ where
- a = Initial Value
- b = 1 + r (for growth) or 1 - r for decay
- r = rate (convert percent to a decimal)
a) Given: a = 250, r = 80% (.80) → b = 1.8
y = 250(1.8)ˣ
b) Given: x = 10
y = 250(1.8)¹⁰
y = 89,261.68 = 89,262 (rounded to the nearest whole number)
2x - 11 >_ 5
To solve for x, we need to get 2x by itself and then simplify.
Add 11 to both sides.
2x >_ 16
Divide both sides by 2 to get x.
x >_ 8 is your solution.
I hope this helps!
Answer:
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41 and 47 because there is no multiplication fact for those numbers