Which of the following is an advantage of using models to represent ideas and explanations?
Select one:
Models help scientists to plan and carry out investigations.
Models help scientists to publish their work within different fields of science.
Models are always colorful and help to draw the attention of the public.
Models help scientists to explain and share their ideas that relate to things that cannot
be observed directly (ex: things that are too fast, too slow, too small, or too big)
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International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Which of the following represents the length of a diagonal of this trapezoid?

Bonnie and bobby are saving money for a vacation. each friend starts with an amount and also saves a specific amount each week. bonnie created a table to show the total she has saved at the end of each week.. weeks 0 1 2 3 4 5 6 7 8 amount saved 12 16 20 24 28 32 36 40 44 bobby came up with the following equation to show the total, y, he has saved at the end of each week, x. y = 12x + 4 compare the rate at which each friend saves money. select the correct answer from the drop-down menu to complete the statement. the rate at which bobby is adding to his savings each week is $ more than the rate at which bonnie is adding to her savings each week.