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Romashka [77]
3 years ago
7

What is equivalent to 3 to the negative 2nd power

Mathematics
1 answer:
VladimirAG [237]3 years ago
6 0
3 to the negative second power is written like this: 3^{-2}. 

When simplifying an expression with a negative exponent, you take a positive version of the exponent, in this case that would be 2, and apply that to the base. 
After doing that, we have 9. 
The next step is to put one over that number.
In this case, now after doing that the answer is \frac{1}{9}. 

Hope this helps!
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Jeff needs to buy food and medication for six cats and one dog. The cost of food and medication for a cat is $5 less than two-th
DerKrebs [107]
Let x = amount for dog
let 2/3x-5 = amount for cat

x + 2/3x-5 = 195   combine x's
1 2/3x or 5/3x
5/3x-5 =195   add 5 to both sides
5/3x = 200   multiply both sides by 3
5x = 600   divided both sides by 5
x = 120

the cost of the dog is $120.00
4 0
3 years ago
Selena is preparing for her eighth-grade graduation party. she must keep within the budget set by her parents. which is the best
Leviafan [203]

Answer:

Basically find the unit rate by doing 3.99/24 = $0.16625/1oz

1 quart = 32 ounces so 4.8/32 = $0.15/1oz

1 gallon = 153.722 ounces so 11/153.722 = 0.07

49.6/768.61 = 0.06

Step-by-step explanation:
D.

5 0
2 years ago
The gas mileage for a particular model car is known to have a standard deviation of σ = 1.0 mile per gallon in repeated tests in
Alik [6]

Answer:

z = -0.577

Step-by-step explanation:

sample mean = ( 24.3 + 24.9 + 24.8 ) / 3 = 24.667

n = 3

σ = 1.0

Test statistic:

z = ( 24.667 - 25 ) / ( 1/SQRT(3) )

z = -0.577

7 0
4 years ago
Help with algebraic equation and to solve it plz
lutik1710 [3]
4) fifteen less than y is 32

15 - y= 32

15 - (-17)= 32

two negatives become positive so 15+17= 32


7 0
4 years ago
(c) what is the probability that at least one adult prefers milk chocolate to dark chocolate?
Schach [20]
Part A:

Given that 47% of adults prefer milk chocolate to dark chocolate, for a random sample of n = 4 adults, the probability that all four adults say that they prefer milk chocolate to dark chocolate is given by

P(4)=(0.47)^4=0.049



Part B:

The probability that exactly two of the four adults say they prefer milk chocolate to dark chocolate is given by

P(2)={ ^4C_2(0.47)^2(1-0.47)^2} \\  \\ =6(0.2209)(0.2809)=0.372



Part C:

The probability that at least one adult prefers milk chocolate to dark chocolate is given by

P(at \ least \ 1)=P(X\geq1) \\  \\ =P(1)+P(2)+P(3)+P(4) \\  \\ =1-P(0)=1-{ ^4C_0(0.47)^0(1-0.47)^4} \\  \\ =1-(0.53)^4=1-0.0789=0.921
6 0
3 years ago
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