To pass a quiz, students need a score of at least 32 points out of a total of 40 points. At least
what percent do the students need to pass the quiz?
A. 32%
B.64%
b. 72%
5. 80%

32 ÷ 40 × 100 = 80%

that's all

80%

Step-by-step explanation:

% required = passing/total points *100%

= 32/40 * 100%

= 4/5 * 100%

= 80%

linearly: 8560 bacteria

exponentially: approximately 75233 bacteria

step-by-step explanation:

assuming it is not exponential (we would have some really complicated logarithms), let's say it is linear. then, after 5 hours, it increased by 1200 bacteria, so every hour it increases by 240 bacteria. this means that after 19 hours, we get 19 * 240 + 4000 bacteria or 3800 + 760 + 4000 = 7800 + 760 = 8560 bacteria.

because it says round your answer, i will do this exponentially (with a calculator, of course). first, we need to find how much it multiplies by every hour, by taking the 5th root of 52/40 or 13/10. this is approximately 0.167. we still need to add 1 to this, because we are multiplying by that number, not adding that amount of the number. now, we just calculate 4000 * (1.167)^19. use a calculator to get approximately 75232.6, or 75233.

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step-by-step explanation: