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3 years ago

Can someone make sure my answers are correct

Mathematics

2 answers:

timurjin [86]3 years ago

7 0

Answer:

yep these are correct

Step-by-step explanation:

Zepler [3.9K]3 years ago

6 0

Answer:

Yes they are all correct. Great job!

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Jane wishes to bake an apple pie for dessert. The baking instructions say that she should bake the pie in an oven at a constant

pychu [463]

Answer:

A=152

K= -Ln(0.5)/14

Step-by-step explanation:

You can obtain two equations with the given information:

T(14 minutes) = 114◦C

T(28 minutes)=152◦C

Therefore, you have to replace t=14, T=114 and t=28, T=152 in the given equation:

$114=190-Ae^{-14k} (I) \\152=190-Ae^{-28k}(II)$

Applying the following property of exponentials numbers in (II):

$e^{a}.e^{b}=e^{a+b}$

Therefore $e^{-28k}$ can be written as $e^{-14k}.e^{-14k}$

$152=190-Ae^{-14k}.e^{14k}$

Replacing (I) in the previous equation:

$152=190-76e^{-14k}$

Solving for k:

Subtracting 190 both sides, dividing by -76:

$0.5=e^{-14k}$

Applying the base e logarithm both sides:

Ln(0.5)= -14k

Dividing by -14:

k= -Ln(0.5)/14

Replacing k in (I) and solving for A:

$Ae^{-14(-Ln(0.5)/14)}=76\\Ae^{Ln(0.5)} =76\\A(0.5)=76$

Dividing by 0.5

A=152

7 0

3 years ago

Please bro- i cant do it...

beks73 [17]

Answer:

what

Step-by-step explanation:

u cant do what???,

8 0

3 years ago

Read 2 more answers

If cos 0 = 3/radical 22 and angle 0 is in Quadrant I, what is the exact value of tan 20 in

Sloan [31]

Answer:

tan θ = (√13)/3

Step-by-step explanation:

cosθ = 3/√22 = adj/hyp

third side of triangle has dimension

c = √((√22)² - 3²) = √13

tan θ = opp/adj = (√13)/3

6 0

3 years ago

Read 2 more answers

Marcus buys a pair that cost $35.99 plus 5.5% tax. Tai buys a pair of shoes that cost $ 39.99 plus 9% tax. Tai uses a coupon off

romanna [79]

Answer:

The difference is $5.62

Step-by-step explanation:

The total cost Marcus will pay is

35.99 + 5.5% of 35.99

= 35.99 + 0.055(35.99) = 35.99 + 1.97945 = 37.96945

The total cost Tai will pay is;

39.99 + 9% of 39.99

= 39.99 + 0.09(39.99) = 43.5891

The difference between the total costs will be;

43.5891 - 37.96945 = 5.61965

To the nearest cent, this is 5.62

4 0

2 years ago

the smiths spend 9% of their budget on entertainment. Their total budget this year is $3,000 more than last year, and this year

Stolb23 [73]

Answer:

The total budget of last year is $50,000 .

Step-by-step explanation:

Given as :

The percentage of budget spend on entertainment = 9%

The total budget of this year = $3000 more than that of last year

The money that will be spend this year on entertainment = $4770

Let The total budget of last year = $A

Let The total budget of this year = $B

<u>Now, According to question</u>

Percentage of budget spend on entertainment × total budget of this year = money that will be spend this year on entertainment

Or, 9 % × $B = $4770

Or, $\dfrac{9}{100}$ × B = 4770

∴ B = $\frac{4770\times 100}{9}$

i.e B = $53,000

So,The total budget of this year = B = $53,000

<u>Again</u>

∵ The total budget of this year = $3000 more than that of last year

i.e The total budget of this year = $3000 + total budget of last year

Or, B = $3000 + A

Or, A = B - $3000

Or, A = $53,000 - $3,000

∴ A = $50,000

So,The total budget of last year = A = $50,000

Hence, The total budget of last year is $50,000 . Answer

4 0

3 years ago