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3 years ago

Logb

Mathematics

2 answers:

Ronch [10]3 years ago

8 0

Answer:

1.511

Step-by-step explanation:

bekas [8.4K]3 years ago

7 0

Answer:

1st part: 1.511

2nd part: A

3rd part: C

Step-by-step explanation:

on edge

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Write a formula that converts weeks to days. d =

Stolb23 [73]

Days= weeks × 7
d = w × 7

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2 years ago

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Mama L [17]

The value for u is 51°.

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3 years ago

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An element with mass 130 grams decays by 22% per minute. How much of the element is remaining after 7 minutes, to the nearest 10

shepuryov [24]

22.8 grams of element will be remaining after 7 minutes

Further explanation:

Given

$Mass\ of\ element=130g\\Percentage\ of\ reduction=22\%$

The element reduces (1-22%) in one minute.

The process will be repeated 7 times for 7 minutes

If we have to calculate the amount of element after 7 minutes

then the total reduction will be: (1-22%)^7

$Remaining\ amount=130*(1-22\%)^7\\=130*(1-0.22)^7\\=130*(0.78)^7\\=130*0.18\\=22.84g\\Rounding\ off\ to\ nearest\ tenth\\=22.8g$

22.8 grams of element will be remaining after 7 minutes

Keywords: Decay, Percentage

Learn more about percentage at:

#LearnwithBrainly

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3 years ago

What is the simplified form of this expression?

Alexxx [7]

Answer:

Option 4

Step-by-step explanation:

=> $-3x^2+2x-4 + 4x^2+5x+9$

Combining like terms

=> $-3x^2+4x^2+2x+5x-4+9$

=> $x^2+7x+5$

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2 years ago

Solve -3x^2-4x-4=0. Use the quadratic formula.

zepelin [54]

Let's solve your equation step-by-step.
−3x2−4x−4=0
Step 1: Use quadratic formula with a=-3, b=-4, c=-4.
x=
−b±√b2−4ac
2a
x=
−(−4)±√(−4)2−4(−3)(−4)
2(−3)
x=
4±√−32
−6

Answer:
No real solutions.

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2 years ago

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