answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elena L
16 days ago
8

The track team is trying to reduce their time for a relay race. First they reduce their time by 2.1 minutes. Then they are able

to reduce that time by 1/10. If their final time is 3.96 minutes, what was their beginning time?
What was the track teams initial relay time in minutes?
Mathematics
1 answer:
PIT_PIT [9.1K]16 days ago
3 0
The initial time was 15.7 minutes.

Explanation of steps:

Let x represent the initial time (in minutes).

The relay team is working on minimizing their relay race duration.

First, they cut down their time by 2.1 minutes.

Afterwards, they manage to reduce that time by 10 percent.

If the concluding time ends up being 3.96 minutes, then

x-t1-t2= 3.6
x= 3.6+ t1+ t2
x= 3.6+ 2.1+ 10
x= 15.7

Thus, their starting time was 15.7 minutes.
You might be interested in
A streaming music site changed its format to focus on previously unreleased music from rising artists. The site manager now want
lawyer [9240]

Answer:

Step-by-step explanation:

It was noted that a music streaming platform modified its format to highlight previously unreleased tracks from emerging artists. The site manager is now aiming to assess whether the daily unique listener count has changed.

The hypothesis is set

H_0: Mean 1- Mean 2 =0\\H_a: Mean 1 - Mean 2 \neq 0

(A two-tailed test for mean difference)

The test statistic is calculated, and the p-value turns out to be 0.0743

Assuming a significance level of 5%, we observe that p-value = 0.0743>0.05

Thus, we accept the null hypothesis.

i.e. there is no statistically significant alteration in the average number of daily unique listeners

The p-value serves as an indicator of the extremity of the observed data. If p is lower than alpha, we thus reject H0; otherwise, we accept it.

7 0
12 days ago
The main span of Bridge A ​(2300 ​feet) is​ _____ percent shorter than the main span of Bridge B ​(4700 ​feet).
Svet_ta [9500]
To determine this answer, you need to calculate the percentage change.
This involves dividing the difference in lengths by the original length. We begin with the main bridge.

4700 - 2300 = 2400
2400 divided by 4700 equals approximately 51.1% shorter.
3 0
1 month ago
2.6 Puzzle time how can you make sure to start a fire with two sticks?
Svet_ta [9500]

Answer:

"Ensure that one of them is a match"

Step-by-step explanation:

Generating heat through friction requires some practice. By elevating the wood's temperature, it's feasible to reach the necessary ignition temperature.

Successful fire-starting depends on proper technique and equipment. Failures often arise from inadequate approach and gear, which can complicate the learning process.

When selecting wood, aim for the following criteria:

  • Dry tinder
  • Wood should be compressible; if it isn't, it's too challenging.
  • Wood that is moderately strong but not overly tough
  • Avoid sap in the wood

Position the two pieces of wood at a 90-degree angle, resembling a cross. Support one stick vertically on the ground, while the other rubs against it quickly, using intervals.

Underneath, place dry tinder that catches fire swiftly after it's ignited.

For the Puzzle, remember the order of the words:

Ensure that one of them is a match.

Utilize tree wood, apply friction and heat until ignition occurs.

5 0
26 days ago
One student from a high school will be selected at random. Let A be the event that the selected student is a student athlete, an
Inessa [9000]

Answer:

0.32

Step-by-step explanation:

P(B|A) = P(A∩B) / P(A)

0.25 = 0.08 / P(A)

P(A) = 0.32

8 0
25 days ago
Read 2 more answers
A catering company uses different functions to estimate the itemized costs for a party. The table below represents the included
babunello [8412]
# of guests   waitstaff gratuity
10                      18
20                      36
30                      54
40                      72
50                      90

<span>If the gratuity changes directly with the number of guests, which formula outlines the connection between the gratuity, t, and the number of guests, g? 
t = 1.8g t = g/18 g = 1.8t g = t/18
</span>
18/10 = 1.8
36/20 = 1.8
54/30 = 1.8

direct variation: <span>t = 1.8g</span>
8 0
11 days ago
Read 2 more answers
Other questions:
  • Jessica is selling books during the summer to earn money for college. She earns a commission on each sale but has to pay for her
    6·2 answers
  • In golf, shooting par is scored as a 0. A score of 2 below par on a hole in golf is called an eagle. Jacob’s friend Michelle sco
    15·2 answers
  • Fill in the blanks. a. A​ relative-frequency distribution is to a variable as a​ __________ distribution is to a random variable
    5·1 answer
  • The population of Ashmore was 925 in 2000 and in 1028 in 2001. the linear model for ashmores population is p= 103t+925, where th
    6·2 answers
  • Kevin cycles 18 miles every morning as part of his exercise. The time it takes him to complete the distance varies inversely as
    12·2 answers
  • My number has nine digits it is evenly divisible by 100 the value of one of the digits is 700,000 the digit in the millions plac
    13·1 answer
  • A cylindrical tank has a radius of 2 m and a height of 9 m. The tank is filled with water. Find the work needed to pump the top
    10·1 answer
  • Consider this polynomial, where a is an unknown real number.
    9·1 answer
  • Monica retiled her square kitchen for $338. If the company she used charged $2 per square foot, how wide is her kitchen?
    13·2 answers
  • Suppose an ant is sitting on the perimeter of the unit circle at the point (1,0). if the ant travels a distance of 2π3 in the co
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!