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alina1380 [7]
3 years ago
8

Please help exponents and scientific notation

Mathematics
1 answer:
Anna007 [38]3 years ago
6 0
Alright! When you have a constant to a power times another constant to a power (ex. [x^3 times x^3] ) you simply add the powers and keep the base [x^6]. When you have a power to a power (ex. [(12^3)^3] ) you multiply the powers and keep the base [12^9]. When you have a constant to a power divided by a constant to a power (ex. [ x^2 divided by x^5] ) you subtract the powers and keep the base. It's hard to see the questions, so I'll leave this here for you to use as a guide.
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Work out the value of each expression, when r= 2.5 and t = 6.
Usimov [2.4K]

Answer:

a)  4(t - r) = 4(6 - 2.5) = 4 x 3.5 = 14

b)  4t - r = (4 x 6) - 2.5 = 24 - 2.5 = 21.5

c)  2(3t - 10) = 2(3 x 6 - 10) = 2(18 - 10) = 2 x 8 = 16

d)  (t - 2)² = (6 - 2)² = 4² = 4 x 4 = 16

e) cannot decipher the equation

f)  6r + t = 6 x 2.5 + 6 = 15 + 6 = 21

8 0
3 years ago
Read 2 more answers
Select the postulate of equality or inequality that is illustrated.
Airida [17]
Hello,
"<" is transitive.
a<b
b<2 ==>a<b<2==>a<2

4 0
3 years ago
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On a scale drawing of a rectangular closet, the length is 125 inches and the width is 3 inches.
katovenus [111]
Scale Factor 1: 42

-----------------------------------------------------
Find actual length for 125 inches:
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125 x 42 = 5250 inches

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Find actual length for 3 inches:
------------------------------------------------------
3 x 42 = 126 inches

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Dimension of the actual closet:
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5250 inches by 126 inches
7 0
3 years ago
3. What is the measure of angle B from the right triangle below?
Talja [164]

Answer:

angle B = 78.46°

Step-by-step explanation:

Use the cosine ratio

cosB=\frac{2}{10} =0.2

B=cos^{-1} (0.2)=78.46^{0}

Hope this helps

8 0
2 years ago
(81/16)1/4 +(81/16)0<br>​
Mila [183]

Answer:

should be 0.28125

Step-by-step explanation:

6 0
3 years ago
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