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kupik [55]
3 years ago
12

X=4 in the equation e^lnx = 4. Why is this so? Can you go through the steps/rules

Mathematics
1 answer:
olga nikolaevna [1]3 years ago
7 0

Answer:

e^(ln x) is just plain x

Step-by-step explanation:

The functions f(x) = e^x and g(x) = ln x are inverses of one another.  In other words, one "undoes" the other.

Thus, as the rule goes, e^(ln x) is just plain x.

Here, e^(ln x) = 4 simplifies to x = 4.

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Paul has $78 in the bank and saves $30 each week. What is the initial value? Be sure to use negative signs if needed.
marin [14]

Answer:

The initial value is $78

Step-by-step explanation:

Given

Base\ Amount = \$78

Additional = \$30 (weekly)

Required

Determine the initial value

The initial value is the amount he has in its bank account before making his weekly savings.

From the question, we have that his initial balance is $78.

Hence, the initial value is $78

However, his weekly balance can be expressed as:

Balance = Base\ Amount + Additional * number\ of weeks

Represent number of weeks with x; So, we have:

Balance = 78 + 30 * x

Balance = 78 + 30 x

6 0
3 years ago
7. Rose can type 70 words per minute (wpm). At this rate, how many words can she type in 30 minutes? a. 3100 wpm b. 40 wpm c. 21
Irina-Kira [14]

Answer:

a. 3100 wpm

1 \: minute = 70 \: words \\ 30 \: minutes  = (30 \times 70) \: words \\  = 2100 \: words

3 0
3 years ago
There are 3,848 students and staff at happy town high school. if the principal friendly and 15 teachers are infected by a zombie
Ostrovityanka [42]

Answer:

no

Step-by-step explanation:

at firth hr - 15×2=

2 nd hr - 60×2

and so on,it takes more than 8 hr

5 0
3 years ago
Is this correct please
Katen [24]
18a is correct, 18b is incorrect, 18c is correct, 18d is false, 18e is false, 18f is true, 19 is incorrect. 
6 0
4 years ago
H(t)=-16t*2+16t=480 need help
Black_prince [1.1K]
I do not need any snarky remarks from you. I was trying to help. FOR EXAMPLE what am I solving for? Y intercept, X intercept. You don't get to get angry with me because I'm asking a simple question girl.
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3 years ago
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