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2 years ago

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jim’s percentile rank in a class of 50 students was the 92nd. what was his rank in the class (1st = best, 2nd = second best, etc

.)?

1 answer:

dezoksy [38]2 years ago

4 0

Jim is ranked third best in his class of 50 students.

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In Greg's that, he has $1$ yellow, $2$ red, and $3$ green tokens. One red token is equivalent to $7$ yellow tokens. One yellow t

vodka [1.7K]

Answer:

$48 green tokens

Step-by-step explanation:

please check the attached file for explanation

4 0

3 years ago

Read 2 more answers

In a murder investigation, the temperature of a corpse was 32.5 degrees C at 1:30 pm and 30.3 degrees C an hour later. Normal bo

svp [43]

Let $T(t)$ be the temperature of the body $t$ hours after 1:30 PM. Then $T(0) = 32.5$ and $T(1) = 30.3$ .

Using Newton's Law of Cooling, $\dfrac{dT}{dt} = k(T - T_s)$ , we have $\dfrac{dT}{dt} = k(T-20)$ . Now let $y = T - 20$ , so
$y(0) = T(0) - 20 = 32.5 - 20 = 12.5$ , so $y$ is a solution to the initial value problem $dy/dt = ky$ with $y(0) = 12.5$ .
By separating and integrating, we have $y(t) = y(0)e^{kt} = 12.5e^{kt}$ .

$y(1) = 30.3 - 20\ \Rightarrow\ 12.5e^{k(1)} = e^{k} = \frac{10.3}{12.5}\ \Rightarrow \\
k = \ln \frac{10.3}{12.5}
$

$y(t) = 37 - 20\ \Rightarrow\ 12.5e^{kt} = 17\ \Rightarrow\ e^{kt} = \frac{10.3}{12.5} \ \Rightarrow \\ \\
kt = \ln \frac{10.3}{12.5}\ \Rightarrow\ t = \left( \ln \frac{17}{12.5} \right)/ \frac{10.3}{12.5} \approx -1.588 \mathrm{\ h}$

≈ 95 minutes. Thus the murder took place about 95 minutes before 1:30 PM, or 11:55 AM.

6 0

2 years ago

Factor : 49c^2 - 25d^6

Keith_Richards [23]

49c^2 - 25d^6
(7c)^2 - (5d^3)^2
(7c + 5d^3)(7c - 5d^3)

The answer is: (7c + 5d^3)(7c - 5d^3).

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3 years ago

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Jonathan bought a new pair of tennis shoes that originally cost $35 but was only on for sale for 20%off.How much did he pay (wit

jolli1 [7]

Your answer would be $28

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2 years ago

(BRAINLIEST) Choose 1 from the following Unit 8 sub-topics and expound: (need 5-6 sentences just on ONE of these topics)

Vladimir79 [104]

Answer:n

Step-by-step explanation:

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2 years ago