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solong [7]
3 years ago
14

What is the sign of −4 ÷ −8? Answer?: 1: Positive 2: Negative 3: Zero

Mathematics
2 answers:
Anarel [89]3 years ago
8 0

Hello There!

I believe the answer is...

2: <u>Negative</u>

Hopefully, this helps you!!

AnimeVines

Komok [63]3 years ago
6 0
You will get 0.5, so I would believe that the answer would be 1: Positive
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Write in standard form a)0.00000678 b)3170000
otez555 [7]

Standard Form:

a) 0.00000678

b) 3170000

Scientific Notation:

a) 6 × 10^{4}

b) 6.78 × 10^{-6}

Is this what you meant?

8 0
3 years ago
A tank has capacity 6 L and initially contains 11 mg of salt dissolved in 3 L of water. A solution containing 1 mg/L of salt ent
BlackZzzverrR [31]

Answer:

The answer is below

Step-by-step explanation:

a) The maximum capacity of he tank is 6 L and initially it contains 11 mg of salt dissolved in 3 L of water. Solution enters the tank at a rate of 3 L/hr, therefore in x hours, the amount of water that have entered the tank = 3x.

Solution also leaves the tank at a rate of 2L/hr, therefore in x hours, the amount of water that have left the tank = 2x

Hence the amount of water present in the tank at x hours is given as:

3 + 3x - 2x = 3 + x

The time taken to full the tank can be gotten from:

3 + x = 6

x = 6 - 3

x = 3 hr

b)

\frac{dQ}{dx}=3-\frac{2Q}{3+x}\\  \\\frac{dQ}{dx}+\frac{2Q}{3+x}=3\\\\let\ u'=\frac{2u}{3+x}\\\\\frac{u'}{u}=\frac{2Q}{3+x}\\\\ln(u)=2ln(3+x)\\\\u=(3+x)^2\\\\(3+x)^2Q]'=3(3+x)^2\\\\(3+x)^2Q=(3+x)^3+c\\\\Q(0)=11\\\\(3+0)^2(11)=(3+0)^3+c\\\\x=72\\\\Q=x+3+\frac{72}{(x+3)^2}\\ \\Q(3)=3+3+\frac{72}{(3+3)^2}=8\ mg

8 mg/ 6 L = 4/3 mg/L

8 0
3 years ago
HELP ME !?!!!!?!?? Please
vovikov84 [41]

Answer:

Step-by-step explanation:i havent done something like this in a long time

7 0
3 years ago
Read 2 more answers
Carolyn sells homemade candles. Write an expression for her total revenue if she sells x candles for $5 each
jok3333 [9.3K]

Answer:

I think it would be X x 5 = Y

Step-by-step explanation:

5 0
3 years ago
Someone plz help me :(
butalik [34]
You have it correct the answer is 20
6 0
2 years ago
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