D) C) -2 Give the equation for the graph. 18) A)y-10x D) y log x Solve the equat

Question

D) C) -2 Give the equation for the graph. 18) A)y-10x D) y log x Solve the equation. 19) 19) log ix -9)-1- log x A) 10, 1 B) 10 C)-1,10 D)-10 20) 20) loga (x-8)+ log4 (x -8) -1 B)65 C) -10, 10 D) 10 Solve the problem. 21) Use the formula P- lekt. A bacterial culture has an initial population of 10,000. f its population 21) declines to 7000 in 6 hours, what will it be at the end of 8 hours? B) 7366 C) 3108 D) 6215 A) 1500 22) 22) How long must S5200 be in a bank at 6% compounded annually to become S1125670? (Use the function PO Po ekt, where Po is the amount initially placed in savings, t is the time in years, and Plt) is the balance after time t. Round to the nearest year.) C) 16 yr D) 13 yr A)14 yr B) 15 yr 23) 23) In the formula N - lekt, N is the number of items in terms of an initial population I at a given time t and k is a growth constant equal to the percent of growth per unit time. How long will it take for the population of a certain country to double if its annual growth rate is 4.9%? Round to the nearest year. C) 14 yr D) 6 yr B)41 yr A) 1 yr

Explanation / Answer

18) equation of the graph is

y = 0.1^x

option c is correct

19) log ( x- 9 ) = 1 - log x

log ( x- 9 ) + log x = 1

log ( x- 9 ) * x =1

x^2 - 9x = 10^1

x^2 - 9x - 10 = 0

( x - 10 ) ( x + 1 ) = 0

x = 10

option b is correct

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.