Giải bài toán sau đây bằng cách lập phương trình: Một nhóm bạn học sinh lên kế hoạch mỗi ngày sẽ làm 20 kính chắn giọt bắn để tặng cho các y bác sĩ đang tham gia chống dịch. Nhưng khi thực hiện thì mỗi ngày nhóm làm được 25 cái. Do đó nhóm không những đã hoàn thành trước thời hạn 2 ngày mà còn vượt mức 35 cái. Tính số kính chắn giọt bắn mà nhóm định làm theo kế hoạch.

In the diagram below, tan θ = sqrt 3. what is the value of m?

Name and describe the three most important measures of central tendency. choose the correct answer below. a. the mean, sample size, and mode are the most important measures of central tendency. the mean of a data set is the sum of the observations divided by the middle value in its ordered list. the sample size of a data set is the number of observations. the mode of a data set is its highest value in its ordered list. b. the sample size, median, and mode are the most important measures of central tendency. the sample size of a data set is the difference between the highest value and lowest value in its ordered list. the median of a data set is its most frequently occurring value. the mode of a data set is sum of the observations divided by the number of observations. c. the mean, median, and mode are the most important measures of central tendency. the mean of a data set is the product of the observations divided by the number of observations. the median of a data set is the lowest value in its ordered list. the mode of a data set is its least frequently occurring value. d. the mean, median, and mode are the most important measures of central tendency. the mean of a data set is its arithmetic average. the median of a data set is the middle value in its ordered list. the mode of a data set is its most frequently occurring value.

What is the total surface area of the square pyramid