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3 years ago

7

A student found out that 8% ofthe students in his school are left-handed.If there are 114 lefties, how many students are in his

school?

1 answer:

AleksAgata [21]3 years ago

8 0

Answer: 1,425 students

Step-by-step explanation: This is easy to solve using proportions/

114/8 = ?/100

First, you cross multiply (or whatever this is called sry) 100x114=11400

Then divide 11400÷8=1,425

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The current student population of the Brentwood Student Center is 2,000. The enrollment at the center increases at a rate of 4%

swat32

Answer:

2249.728 so the answer would be 2250

Step-by-step explanation

2000(1.04)^3 you can change the 3 out for any number to find the population for any given year.

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4 years ago

Can u plz show work?Only need 84

Sonbull [250]

Answer:

Step-by-step explanation:

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3 years ago

1.Arsenic-74 is used to locate brain tumors. It has a half-life of 17.5 days. 90 mg wereused in a procedure. Write an equation t

Sophie [7]

$1)\text{ }N_t\text{ = 90\lparen}\frac{1}{2})^{\frac{t}{17.5}}$

2) 5.625 mg will be left

Explanation:

1) Half-life = 17.5 days

initial amount of Arsenic-74 = 90 mg

To get the equation, we will use the equation of half-life:

$\begin{gathered} N_t\text{ = N}_0(\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}} \\ where\text{ N}_t\text{ = amount remaining} \\ N_0\text{ = initial amount} \\ t_{\frac{1}{2}\text{ }}\text{ = half-life} \end{gathered}$ $N_t\text{ = 90\lparen}\frac{1}{2})^{\frac{t}{17.5}}$

2) we need to find the remaining amount of Arsenic-74 after 70 days

t = 70

$\begin{gathered} N_t=\text{ 90\lparen}\frac{1}{2})^{\frac{70}{17.5}} \\ N_t\text{ = 5.625 mg} \end{gathered}$

So after 70 days, 5.625 mg will be left

4 0

1 year ago

H2 + 7h + 10 = 0<br> Help please

Leni [432]

Answer:

-2, -5

Step-by-step explanation:

h2 + 7h + 10 = 0

h^2 +7h + 10 = 0

h^2 +2h +5h + 10 = 0

h(h+2) + 5(h+2) = 0

h+2 = 0 or h+5 = 0

h = -2 or h = -5

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3 years ago

John bought a cell phone for $99 and the %7 sales tax was added at the register. John gave the cashier six $20 bills, how much c

lord [1]

6.93 = tax

105.93 = total

He would receive $14.07

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3 years ago

Read 2 more answers