1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Thepotemich [5.8K]
3 years ago
9

Can somebody please help me :(

Mathematics
1 answer:
Westkost [7]3 years ago
7 0

<u>Steps:</u>

Boys: 30+40+50+60+60+70+70+70+80+80+80+90+90+100 = 970

Girls: 10+20+50+50+60+70+70+80+80+80+90+100 = 760

THEN Divide the sum of boys and girls but how many numbers you added

970 ÷ 14 = 69.2

910 ÷ 12 = 63.3

You might be interested in
Y=−(x−1)(x+3) has how many real roots?<br> A. 0<br> B. cannot be determined<br> C. 2<br> D. 1
S_A_V [24]

Step-by-step explanation:

2 real roots in thequestipn

4 0
3 years ago
Read 2 more answers
Tony eats about 500 lbs. feline blend cat food, which is a blend of beef and vitamins, every week and 5 days. Find the base rate
Whitepunk [10]

Answer:

14.29 rounded

Step-by-step explanation:

Hope this helps if does not im really sorry.

8 0
3 years ago
Read 2 more answers
Suppose 4 mg of a drug is injected into a person's bloodstream. As the drug is metabolized, the quantity diminishes at the conti
Brut [27]
Let Q(t) = the mass (mg) remaining after t hours.
We are told that Q diminishes by 3% every hour.

When t = 0, Q = 4 mg
When t = 1,  Q = 4*0.97 mg
When t = 2, Q = 4*(0.97)² mg

By induction,
Q(t) = 4 (0.97)^{t} \, mg

Q'(t) = 0.97Q
Therefore the rate of decrease is 3% per hour.

The person receives an additional dosage when Q falls to 0.50 mg. This happens when
4(0.97)^{t}=0.5 \\0.97^{t} = 0.125 \\ t \,ln(0.97) = ln(0.125) \\ t =  \frac{ln(0.125)}{ln(0.97)} =68.27 \, hrs

After the second injection, the mass is now 4.5 mg. Therefore
Q(t)=4.5(0.97)^{t}

When the mass again reaches 0.50 mg, then
4.5(0.97)^{t}=0.5 \\ 0.97^{t}=0.1111 \\ t \, ln(0.97) = ln(0.1111) \\ t = 72.14 \, hrs

Answers: 
(a) Q(t) = 4(0.97)^{t}
(b) 3% per hour
(c) 68.3 hours
(d) 72.1 hours

3 0
3 years ago
A city determines that a planned community must have at least 4 acres of developed and open space, and the difference between th
Bezzdna [24]

Answer:

The graph in the attached figure

Step-by-step explanation:

Let

x ----> the number of open acres

y ----> the number of developed acres

we know that

x+y \geq 4 -----> inequality A

The solution of the inequality A is the shaded area above the solid line x+y=4

y-x\leq 1 -----> inequality B

The solution of the inequality B is the shaded area below the solid line y-x=1

so

The graph in the attached figure

3 0
3 years ago
Read 2 more answers
A car drove 10/45 miles in 0.4 hours. How fast was the car traveling in miles per hour?
BARSIC [14]

Answer:

1.2 hours equal to 30mph

Step-by-step explanation:

Pls mark brainliest

7 0
3 years ago
Other questions:
  • An automobile engineer is redesigning a conical chamber that was originally specified to be 12 inches long with a circular base
    6·2 answers
  • A person in a canoe wants to
    13·1 answer
  • There are 35,000 McDonald's restaurants worldwide. There are 14,146 locations in the United States and 2,975 locations in Japan.
    13·1 answer
  • A twenty-five foot ladder just reaches the top of a house and forms an angle of 41.5° with the wall of the house. how tall is th
    7·2 answers
  • Elias's teacher has given him a rectangle that is 15 feet by 20 feet. She has asked him to create a new rectangle using a scale
    12·2 answers
  • Simplify negative 8 over 2 ÷ 6 over negative 3.<br> negative 4<br> 2<br> negative 2<br> 4
    12·2 answers
  • Side V W is parallel to Side Y Z in the map below. Triangle V X W. Side V W is 4 miles and side V X is 3 miles. Triangle X Z Y.
    15·2 answers
  • A survey found that 31% of all teens buy soda (pop) at least once each week. Seven teens are randomly selected. The random varia
    13·1 answer
  • Please help!! Geometry question<br> (see attachment)
    15·1 answer
  • Anybody know both questions
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!