Answer:
Step-by-step explanation:
r²+8r=−7
Step 1: Subtract -7 from both sides.
r²+8r−(−7)=−7−(−7)
r²+8r+7=0
Step 2: Use quadratic formula with a=1, b=8, c=7.
r=

 
        
             
        
        
        
It simplifies to the proper fraction 14/15 so it cannot be a mix number 
hope this helps !!
        
             
        
        
        
To round numbers to the nearest hundred thousand, make the numbers whose last five digits are 00001 through 49999 into the next lower number that ends in 00000. For example 6,424,985 rounded to the nearest hundred thousand would be 6,400,000.
        
                    
             
        
        
        
Answer:
275 miles in 5 hours 
55 miles in one hour
Check
to check if im right 
275×2 would be how many miles she drove in 10 hours rght ? 275×2=550
550 miles in 10 hours 
we know one hour is 55 miles & 5 hours is 275 & 10 hours is 550 
10 hours plus 3 hours = 13 hours right ? 
55 ×3 = 165
550 +165=715
715 miles in 13 hours 
Step-by-step explanation:
715÷13 to get how many miles she drove in one hour .
=55 miles in 1 hour .
then multiply 55 ×5 to get how many miles she drove in 5 hours 
55×5=275
275 miles in 5 hours
 
        
             
        
        
        
Answer:
the intrinsic growth rate of the population = 0.67 - 0.06 = 0.61 or 61%
Step-by-step explanation:
since populations increase exponentially, the same will happen here
in 5 years the population should be:
P₅ = P₀e°⁶¹ˣ⁵ = 140e°⁶¹ˣ⁵ = 2,956.15 ≈ 2,956
in 10 years the population will be:
P₁₀ = P₀e°⁶¹ˣ¹⁰ = 140e°⁶¹ˣ¹⁰ = 62,420.09 ≈ 62,420
when you are using exponential growth rates, we have to assume that r will always remain constant