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2 years ago

I need help with this one , please . (13)^2(13)^-4(13)^5 = 13^_____ to what power ? Can you explain please

1 answer:

6 0

$13^2*13^{-4}*13^5= 13^7*13^{-4}\to\boxed{13^3}$

When you have exercices like this tipe you write the base and add the exponents.the exponents are: 2; -4 and 5 so you put them in a sum:

2+ (-4) + 5=

=2 -4+5=

=7 -4=

=3

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A dinosaur fossil is 93,550,000 years old. How can you express this age in scientific notation

garik1379 [7]

1. 9.355 × $10^{7}$ can be used to express the age of the dinosaur fossil.

Step-by-step explanation:

Step 1; To determine which value is the closest to 93,550,000 we must calculate how much the 4 options equal. If there are decimals in the number, they are moved from the decimal part of the number to the integer part with every power of 10 i.e. 2.4 × 10 = 24, 2.44 × 10² = 244.

Step 2; Now we determine how much the 4 options equal.

1. 9.355 × $10^{7}$ = 93,550,000.

2. 9 × $10^{7}$ = 90,000,000.

3. 9.36 × $10^{7}$ = 93,600,000.

4. 9.3 × $10^{7}$ = 93,000,000.

Out of the four options, option 1 equals the value of 93,550,000. So option 1 can be used to express the age with the highest precision.

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3 years ago

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A circle with a radius of 10 inches is placed inside a square with a side length of 20 inches. Find the area of the square.

NikAS [45]

I think the answer is A , if y’all don’t get it right I’m sorry

4 0

2 years ago

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Can some one please help me

UNO [17]

Answer: The answer is 5.

3 0

2 years ago

Yeah, im clueless please help;-;

svetlana [45]

Answer:

Starting from the left, top to bottom. first answer is 8, second is 21.3, third is 64, 204.8. Right side is essentially y=x to a power, the answers are from top to bottom, 8,27,64,125

Step-by-step explanation:

Essentially, its just asking you to divide the given y values by the x values.

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2 years ago

2 5/8 ×3 1/7 What's the answer for this ?

nikdorinn [45]

Answer:

$8 \frac{1}{4}$

Step-by-step explanation:

Let us solve

$2 \frac{5}{8} \times 3 \frac{1}{7} \\ \frac{21}{8} \times \frac{22}{7} \\ \frac{462}{56} \\ \frac{462 \div 2}{56 \div 2} \\ \frac{231}{28} \\ \frac{231 \div 7}{28 \div 7} \\ \frac{33}{4} \\ 8 \frac{1}{4}$

hope this helps you.

Please let me know if you have another questions :-)

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2 years ago

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