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Brut [27]
3 years ago
14

Please help brainliest and 50 points for whoever answers all of these first

Mathematics
1 answer:
Lemur [1.5K]3 years ago
4 0

Answer:

my laptop doesnt let me download pdf :/

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5 The area of a rectangular lawn is 255 m². If its length is 15 m, find its perimeter.​
Marina CMI [18]
Area of a rectangular lawn = l×b

255=15×x

Hence the breadth is 17 m

Hence perimeter =2(l+b)=2(15+17)=64
3 0
3 years ago
Hellllpppp plsssss just click the picture then you see it
Solnce55 [7]

Answer:

1. 8 + 13 = 13 + 8.

2. 6 + ( 12 + 4) = 6 + ( 4 + 12).

Step-by-step explanation:

6 0
2 years ago
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A culture started with 3000 bacteria. After 2 hours it grew to 3300 bacteria. Predict how many bacteria will be present after 16
bixtya [17]

Answer:

6,430\ bacteria

Step-by-step explanation:

we have a exponential function of the form

y=a(1+r)^{x}

where

y is the population of bacteria

a is the initial value

r is the rate of growth

x is the number of hours

we have

a=3,000 bacteria

y=3,000(1+r)^{x}

For x=2, y=3,300

substitute

3,300=3,000(1+r)^{2}

(3,300/3,000)=(1+r)^{2}

Apply square root both sides

1+r=\sqrt{3.3/3}

r=\sqrt{3.3/3}-1

r=0.0488

r=4.88\%

substitute in the equation

y=3,000(1+0.0488)^{x}

y=3,000(1.0488)^{x}

<u><em>Predict how many bacteria will be present after 16 hours</em></u>

For x=16 hours

substitute

y=3,000(1.0488)^{16}

y=6,430\ bacteria

6 0
3 years ago
Cherries cost $4.99 per pound. If Lacey buys 3.5 pounds, how much will she pay for the cherries?
Vladimir79 [104]
It would $17.47. if you times $4.99 by 3.5 pounds of cherries then your answer will be $17.47
4 0
3 years ago
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La formula para calcular el 30% de descuento en una tienda esta dada por la expresion y=0.30X
trapecia [35]
La formula para calcular cualquier descuento esta dada por (100 - descuento)/100

en ese caso seria Y = (1-0.3)X = 0.7X
3 0
3 years ago
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