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Alexxandr [17]
3 years ago
6

The length of time a particular smartphone's battery lasts follows an exponential distribution with a mean of ten months. A samp

le of 64 of these smartphones is taken. Find the probability that the sample mean is between seven and 11.
Mathematics
1 answer:
aev [14]3 years ago
8 0

Answer:

Probability between 7 and 11 is 0.7799

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2. My bank account contains pesos 3021 and make monthly withdrawals of pesos 78 for 12 months. What is my new bank balance.
Agata [3.3K]

Answer:

ok I will try solve your problem. good luck

Step-by-step explanation:

a. known: Bank balances : 3021 pesos

monthly withdrawals: 78 pesos

months of withdrawal: 12 months

b. asked: new bank balance?

c. equation: New bank balance= bank balance - ( monthly withdrawals X months of withdrawal)

d. New bank balance: 3021- (78x12)

= 3021 - 936

= 2085 pesos

e. my new bank balance is 2085 pesos.

4 0
1 year ago
You need to be at least 39.37 inches tall (about a meter) to ride on a bumper car. Diego’s cousin is 35.75 inches tall. How many
blsea [12.9K]
39.37-35.75=3.62

3.62 inches
6 0
2 years ago
If the simple interest on ​$2000 for 3 years is ​$​300, then what is the interest​ rate?
ivann1987 [24]

~~~~~~ \textit{Simple Interest Earned} \\\\ I = Prt\qquad \begin{cases} I=\textit{interest earned}\dotfill &\$300\\ P=\textit{original amount deposited}\dotfill & \$2000\\ r=rate\to r\%\to \frac{r}{100}\\ t=years\dotfill &3 \end{cases} \\\\\\ 300=(2000)(r)(3)\implies 300=6000r\implies \cfrac{300}{6000}=r \\\\\\ \cfrac{1}{20}=r\implies 0.05=r\implies \stackrel{\textit{converting to percent}}{100\cdot 0.05}\implies \stackrel{\%}{5}=r

6 0
2 years ago
carter deposited $70 in a savings account earning 10% interest ,compounded anually. Write the equation
solniwko [45]
Equation for what?  Amount after so and so number of years?

If so, then A = $70(1+0.10)^t, where t is the # of years.
3 0
3 years ago
Read 2 more answers
Jenna’s weight changed by -3 kg last month. Sarah’s weight changed by 2 1/2kg last month who lost more weight?
Law Incorporation [45]

Hello, I'll try to make this as easy to understand as possible, anyways, let's begin:

First, we know that 3 is a bigger number than 2 1/2, and since it's negative, it means they lost weight, therefore...

Jenna lost more weight than Sarah.

Hope this helped! c:

4 0
3 years ago
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