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3 years ago

5

I have 7 candles lit 2 go out how many do i have left

1 answer:

ASHA 777 [7]3 years ago

8 0

If you have 7 candles lit and 2 go out, the number of candles left is given by

7 - 2 = 5

Therefore, 5 candles are left lit.

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4. Hydrocarbons in the cab of an automobile were measured during trips on the New Jersey Turnpike and trips through the Lincoln

pochemuha

Answer:

No these these result do not differ at 95% confidence level

Step-by-step explanation:

From the question we are told that

The first concentrations is $c _1= 30.0 \ g/m^3$

The second concentrations is $c _2 = 52.9 \ g/m^3$

The first sample size is $n_1 = 32$

The second sample size is $n_2 = 32$

The first standard deviation is $\sigma_1 = 30.0$

The first standard deviation is $\sigma_1 = 29.0$

The mean for Turnpike is $\= x _1 = \frac{c_1}{n} = \frac{31.4}{32} = 0.98125$

The mean for Tunnel is $\= x _2 = \frac{c_2}{n} = \frac{52.9}{32} = 1.6531$

The null hypothesis is $H_o : \mu _1 - \mu_2 = 0$

The alternative hypothesis is $H_a : \mu _1 - \mu_2 \ne 0$

Generally the test statistics is mathematically represented as

$t = \frac{\= x_1 - \= x_2}{ \sqrt{\frac{\sigma_1^2}{n_1} +\frac{\sigma_2^2}{n_2} }}$

$t = \frac{0.98125 - 1.6531}{ \sqrt{\frac{30^2}{32} +\frac{29^2}{32} }}$

$t = - 0.0899$

Generally the degree of freedom is mathematically represented as

$df = 32+ 32 - 2$

$df = 62$

The significance $\alpha$ is evaluated as

$\alpha = (C - 100 )\%$

=> $\alpha = (95 - 100 )\%$

=> $\alpha =0.05$

The critical value is evaluated as

$t_c = 2 * t_{0.05 , 62}$

From the student t- distribution table

$t_{0.05, 62} = 1.67$

So

$t_c = 2 * 1.67$

=> $t_c = 3.34$

given that

$t_c > t$ we fail to reject the null hypothesis so this mean that the result do not differ

6 0

3 years ago

Does 6 go into 56 plz help me with this problem

Fofino [41]

The closest it gets is 6*9 which is 54

5 0

3 years ago

Read 2 more answers

Identify the following equation as that of a line, a circle, an ellipse, a parabola, or a hyperbola. x^2 + 2y^2 = 2

Sergeu [11.5K]

This is an equation representing the ellipse

Explanation:

The general equation for an ellipse is $\frac{x^{2} }{a^{2} } + \frac{y^{2} }{b^{2} } = 1$ so, when you simplify it according to the characteristics of a and b, you would end up in the similar form of the equation given

where a represents half the length of the major axis and b represents half the length of the minor axis.

The easiest method to identify, look at whether both the variables are squared, and also the coefficient of x and y should be positive but different.

7 0

3 years ago

Which standard form equation below correctly represents the quadratic function

Charra [1.4K]

Answer: 4) y = -1/3x² + 2x - 1

Step-by-step explanation:

Given :

y = $\frac{-1}{3}$ $(x-3)^{2}$ + 2

Expanding (x-3)² will give :

$x^{2}$ - 6x + 9

substituting into the function , we have :

y = $\frac{-1}{3}$ $( [tex]x^{2}$ - 6x + 9 ) + 2

Expanding , we have

y = $\frac{-1}{3}$ $x^{2}$ + 2x - 3 + 2

y = $\frac{-1}{3}$ $x^{2}$ + 2x - 1

7 0

3 years ago

A rectangular prism has a volume of 2320.5 in.³ a width of 12.75 inches and a height of 14 inches what is the length?

Mamont248 [21]

I think it's 13 inches because V=Bh

8 0

3 years ago