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xz_007 [3.2K]
3 years ago
12

URGENT!!! anyone know this? 10 POINTS!!

Mathematics
2 answers:
slavikrds [6]3 years ago
8 0

Answer:

0.00052 \\  = 5.2 \times  {10}^{ - 4}

In-s [12.5K]3 years ago
3 0

Answer:

b 5.2 *10-4

Step-by-step explanation:

.00052

We are moving the decimal 4 places to the right to make it in scientific notation.  This puts it in the form a* 10^b  a must be between 1 and less than 10  and b is the number of places we moved it.  It we move it to the left it is positive and to the right it is negative.

5.2 *10-4

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If a= -3 what is 3a^2
trapecia [35]

Answer:

27

Step-by-step explanation:

If a= -3 what is 3a^2 = 27

4 0
2 years ago
Travis has a savings account that his parents opened for him. It pays 6% annual interest. His uncle also opened an account for h
mezya [45]
So let's say the amounts are "a" and "b", at 6% and 8% respectively.

how much is 6% of a?  well (6/100) * a, or 0.06a.
how much is 8% of b?  well (8/100) * b, or 0.08b.

so hmm whatever "a" and "b" amounts are, we know that their yield is $100, thus 0.06a + 0.08b = 100.

now, there's more money in "a" than in "b", 500 bucks more, so whatever "b" is, we know that a = b + 500.

\bf \begin{cases}
0.06a+0.08b=100\\
\boxed{a}=b+500\\
----------\\
0.06\left( \boxed{b+500} \right)+0.08b=100
\end{cases}
\\\\\\
0.06b+0.08b+30=100\implies 0.02b=70\implies b=\cfrac{70}{0.02}
\\\\\\
b=3500

how much was deposited in the 6% one?  well, a = b + 500.
8 0
3 years ago
Express 2.6kg as a percentage of 6.5 kg
fredd [130]
2.6  * 100 / 6.5    =  40 %
4 0
3 years ago
A chicken weighs t lbs. It needs to be cooked for 20 minutes per lb plus an extra 15 minutes. What is the total cooking time? Is
Nostrana [21]

Answer:

Total cooking time = 20t + 15

The expression 15t + 20 is wrong.

Step-by-step explanation:

weight of chicken = t lbs

cook time per lb = 20 minutes

This means that:

1 lb weight requires a cooking time of 20 minutes

1 lb = 20 minutes

∴ t lbs = 20 × t = 20t minutes.

We were also told that each chicken required an extra cooking time of 15 minutes, in addition to the total cooking time due to the weight. Therefore, the total cooking time is calculated thus:

Total cooking time = cooking time due to weight + 15 minutes

Total cooking time = 20t + 15

Hence the expression 15t + 20 is wrong, due to the explanation given above.

8 0
3 years ago
Please answer all questions i will give brainliest
jarptica [38.1K]

Answer:

Answers for 1-126

Step-by-step explanation:

a. x + 8 = 21

-8 -8

x = 13

b. x - 32 = 55

+32. +32

x = 87

c. 3x = 54

÷3. ÷3

x = 18

d. x/5 = 10

×5. ×5

x = 50

Answer for 1-124

1/5 = 2/10 , so 2 of the 10 colors are blue and 3 of the 10 colors are green.

The probability is 5/10 = 1/2

this is all I could do. sorry

4 0
2 years ago
Read 2 more answers
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