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zvonat [6]
3 years ago
14

20 feet below sea level positive or negative?

Mathematics
1 answer:
tester [92]3 years ago
6 0
Answer is negative 20
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What is the error in the proof? The error is in step 3. The reason should be the quotient property of exponents. The error is in
galina1969 [7]

Answer:

The error is in step 3. You cannot use a property of logarithms to prove that same property.

Step-by-step explanation:

Here we  the proof of the quotient rule as

If Logₐx = M and Logₐy = N

Then x = a^M and y = a^N

x ÷ y = a^M ÷  a^N = a^{(M-N)}

Take log of both sides we get

Logₐ(x÷y) = Logₐa^{(M-N)}

Logₐ(x÷y) =M-N logₐa

Logₐ(x÷y) =M-N

∴Logₐ(x÷y) = Logₐx - Logₐy

5 0
3 years ago
A newborn baby weighs 8 pounds. At her three month check-up, her weight has increased by 60%. How much does she weigh at the che
Ksju [112]

Answer: You have to multiply the weight by the precentage I think, which would be: 480 Pounds

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is the m∠ABC?<br><br> 1)m∠ABC = 60°<br> 2)m∠ABC = 67°<br> 3)m∠ABC = 120°<br> 4)m∠ABC = 127°
docker41 [41]

we are given

m∠BCD =67

and  m∠BDC=60

we know that

m∠ABC is exterior angle

m∠BCD  and  m∠BDC are interior angles

exterior angle is sum of interior angles

so, we can write it as

m∠ABC=m∠BCD+m∠BDC

now, we can plug values

and we get

m∠ABC=60+67

m∠ABC=127

so, option-4.........Answer


7 0
4 years ago
Read 2 more answers
The volumes of two similar figures 27mm^3 and 1331mm^3. If the surface area of the smaller figure is 18mm^2, what is the surface
nlexa [21]
\bf \qquad \qquad \textit{ratio relations}&#10;\\\\&#10;\begin{array}{ccccllll}&#10;&Sides&Area&Volume\\&#10;&-----&-----&-----\\&#10;\cfrac{\textit{similar shape}}{\textit{similar shape}}&\cfrac{s}{s}&\cfrac{s^2}{s^2}&\cfrac{s^3}{s^3}&#10;\end{array} \\\\&#10;-----------------------------\\\\&#10;\cfrac{\textit{similar shape}}{\textit{similar shape}}\qquad \cfrac{s}{s}=\cfrac{\sqrt{s^2}}{\sqrt{s^2}}=\cfrac{\sqrt[3]{s^3}}{\sqrt[3]{s^3}}\\\\&#10;-------------------------------\\\\

\bf \cfrac{small}{large}\qquad \cfrac{\sqrt{s^2}}{\sqrt{s^2}}=\cfrac{\sqrt[3]{s^3}}{\sqrt[3]{s^3}}\qquad thus\qquad \cfrac{\sqrt[3]{27}}{\sqrt[3]{1331}}=\cfrac{\sqrt{18}}{\sqrt{a}}&#10;\\\\\\&#10;\cfrac{3}{11}=\sqrt{\cfrac{18}{a}}\implies \left( \cfrac{3}{11} \right)^2=\cfrac{18}{a}\implies \cfrac{3^2}{11^2}=\cfrac{18}{a}\implies a=\cfrac{11^2\cdot 18}{3^2}

and surely, you know how much that is.
6 0
3 years ago
The blueprint of a deck has a scale of 2 centimeters equals 9 feet. The scale drawing is shown below.
GenaCL600 [577]

Answer:24

Step-by-step explanation:24

7 0
3 years ago
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