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OverLord2011 [107]
2 years ago
13

You are interested in determining which of two brands of light bulbs, brand A and brand B, lasts longer under differing conditio

ns of use. Fifty Bovano lamps are fitted with brand A light bulbs and 50 Bulbrite lamps are fitted with brand B light bulbs. Each light bulb is left on for 20,000 hours straight. Light bulb life is then measured for each bulb, and the average light bulb life for the two brands is compared. What is wrong with this experimental design?
Nothing is wrong with this design.
The type of lamp is a confounding variable.
Not enough light bulbs of each type are used in the study.
The experiment should have been conducted on more than two brands of lamps.
Mathematics
2 answers:
bulgar [2K]2 years ago
7 0

Answer:

The type of lamp is a confounding variable.

Step-by-step explanation:

to test the average life of the bulbs the same lamps should be used

Fofino [41]2 years ago
5 0

Answer:

The answer would be A. 1 1/5

Hope this helps!!!

Step-by-step explanation:

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Ramon has 6.75 kg coffee. he wants 0.25 kg bags. how many bags does he need?
Hatshy [7]

Answer:

Ramon would need 27 bags

Step-by-step explanation:

This is because if you divide 6.75 by 0.25 you would get 27

5 0
2 years ago
Last year Beth's annual salary was $38,350. This year she received a promotion and now earns $46,462 annually. She is paid biwee
kenny6666 [7]

Answer:

Quite simple. There are 52 weeks in a year. She gets paid 26 times, every other week.

38,350 / 26 = her salary from last year per check.

46,462 / 26 = her new salary per check

(46,462 - 38,350) / 26 = the difference per week

8 0
1 year ago
Brad owns 3 surfboards and 2 wet suits. If he takes one surfboard and one wet suit to the beach, how many different combinations
Reptile [31]

Answer:

1

Step-by-step explanation:

He only has 1 wetsuit and 1 surfboard.

6 0
2 years ago
MJ Supply distributes bags of dog food to pet stores. Its markup rate is 28%. Which equation represents the new price of a bag,
andreev551 [17]

Answer:

i think its the second one because if you multiply a number by a decimal with a value lower than 1, then the number will go down, but im not positive

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Please... Solve this: the bearing of a tree from a house is 295°. Find the bearing of the house from the tree.
jonny [76]

Given parameters:

Bearing of the tree from the house  = 295°

Unknown:

Bearing of the house from the tree = ?

Solution:

This is whole circle bearing problem(wcb). There are different ways of representing directions from one place to another. In whole circle bearing, the value of the bearing varies from 0° to 360° in the clockwise direction.

To find the back bearing in this regard, simple deduct the forward bearing from 360°;

    Backward bearing  = 360° -295°

                                    = 65°

The bearing from house to the tree is 65°

4 0
2 years ago
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